54 (number)

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

In mathematics

 * 54 is an abundant number and a semiperfect number, like all other multiples of 6.
 * It is twice the third power of three, 3$3$ + 3$3$ = 54, and hence is a Leyland number.
 * 54 is the smallest number that can be written as the sum of three positive squares in more than two different ways: 7$2$ + 2$2$ + 1$2$ = 6$2$ + 3$2$ + 3$2$ = 5$2$ + 5$2$ + 2$2$ = 54.
 * It is a 19-gonal number,
 * In base 10, 54 is a Harshad number.
 * The Holt graph has 54 edges.
 * The sine of an angle of 54 degrees is half the golden ratio.
 * The number of primes ≤ 28.
 * A Lehmer-Comtet number.
 * 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.



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