54 (number)

Short description: Natural number

| <- 53  | 54 |  55 ->

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← 50 51 52 53 54 55 56 57 58 59 →

List of numbers — Integers

← 0 10 20 30 40 50 60 70 80 90 →

Cardinal| fifty-four
Ordinal| 54th
(fifty-fourth)
Factorization| 2 × 33
Divisors| 1, 2, 3, 6, 9, 18, 27, 54
Greek numeral| ΝΔ´
Roman numeral| LIV
Binary| 1101102
Ternary| 20003
Quaternary| 3124
Quinary| 2045
Senary| 1306
Octal| 668
Duodecimal| 4612
Hexadecimal| 3616
Vigesimal| 2E20
Base 36| 1I36

54 (fifty-four) is the natural number following 53 and preceding 55.

## Contents

* 1 In mathematics
* 2 In science
* 2.1 Astronomy
* 3 In sports
* 4 In other fields
* 5 See also
* 6 References

## In mathematics

54 as the sum of three positive squares.

* 54 is an abundant number and a semiperfect number, like all other multiples of 6.[1]
* It is twice the third power of three, 33 \+ 33 = 54, and hence is a Leyland number.[2]
* 54 is the smallest number that can be written as the sum of three positive squares in more than two different ways: 72 \+ 22 \+ 12 = 62 \+ 32 \+ 32 = 52 \+ 52 \+ 22 = 54.[3][4]
* It is a 19-gonal number,[5]
* In base 10, 54 is a Harshad number.[6]
* The Holt graph has 54 edges.
* The sine of an angle of 54 degrees is half the golden ratio.
* The number of primes ≤ 28.[7]
* A Lehmer-Comtet number.[8]
* 54 is the only non-trivial Neon Number in Power 9: 549 = 3,904,305,912,313,344; 3 + 9 + 0 + 4 + 3 + 0 + 5 + 9 + 1 + 2 + 3 + 1 + 3 + 3 + 4 + 4 = 54

## In science

* The atomic number of xenon is 54.

### Astronomy

* Messier object M54, a magnitude 8.5 globular cluster in the constellation Sagittarius
* The New General Catalogue object NGC 54, a spiral galaxy in the constellation Cetus
* The number of years in three Saros cycles of eclipses of the sun and moon is known as a Triple Saros or exeligmos (Greek: "turn of the wheel").

## In sports

* Fewest points in an NBA playoff game: Chicago (96), Utah (54), June 7, 1998
* The New York Rangers won the Stanley Cup in 1994, 54 years after their previous Cup win. It is the longest drought in the trophy's history.
* For years car number 54 was driven by NASCAR's Lennie Pond. More recently, it is known as the Nationwide Series car number for Kyle Busch.
* A score of 54 on a par 72 course in golf is colloquially referred to as a perfect round. This score has never been achieved in competition.
* The number used when a player is defeated 3 games in a row in racquetball.

A Rubik's Cube has 54 colored squares Traditional Japanese symbols of the 54 chapters of the Tale of Genji

## In other fields

54 is also:

* +54 The code for international direct dial phone calls to Argentina
* A broadcast television channel number
* 54, a 1998 film about Studio 54 starring Ryan Phillippe, Mike Myers, and Salma Hayek
* 54, a novel by the Wu Ming collective of authors
* In the title of a 1960s television show Car 54, Where Are You?
* The number of the French department Meurthe-et-Moselle
* New York's Warwick New York Hotel is on West 54th Street
* The number of cards in a deck of playing cards, if two jokers are included
* The number of countries in Africa
* Year identifier used on motor vehicles registered in the UK between 1 September 2004 and 28 February 2005
* Six by nine, the incorrect Answer to the Ultimate Question of Life, the Universe, and Everything

## See also

* List of highways numbered 54

## References

1. ↑ "Sloane's A005835 : Pseudoperfect (or semiperfect) numbers". OEIS Foundation. https://oeis.org/A005835.
2. ↑ "Sloane's A076980 : Leyland numbers". OEIS Foundation. https://oeis.org/A076980.
3. ↑ Sloane, N. J. A., ed. "Sequence A025331". OEIS Foundation. https://oeis.org/A025331.
4. ↑ Sloane, N. J. A., ed. "Sequence A025323". OEIS Foundation. https://oeis.org/A025323.
5. ↑ "Sloane's A051871 : 19-gonal numbers". OEIS Foundation. https://oeis.org/A051871.
6. ↑ "Sloane's A005349 : Niven (or Harshad) numbers". OEIS Foundation. https://oeis.org/A005349.
7. ↑ Sloane, N. J. A., ed. "Sequence A007053 (Number of primes <= 2^n)". OEIS Foundation. https://oeis.org/A007053. Retrieved 2022-06-02.
8. ↑ Sloane, N. J. A., ed. "Sequence A005727 (n-th derivative of x^x at x=1. Also called Lehmer-Comtet numbers)". OEIS Foundation. https://oeis.org/A005727.

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