54 (number)

← 53 55 → 54
← 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	$2 \cdot 3^3$
Divisors	1, 2, 3, 6, 9, 18, 27, 54
Roman numeral	LIV
Binary	1101102
Octal	668
Duodecimal	4612
Hexadecimal	3616

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

In mathematics

54 is a 19-gonal number. Twice the third power of three, 54 is a Leyland number. 54 can be written as the sum of three squares in three different ways: 7² + 2² + 1² = 6² + 2(3²) = 2(5²) + 2² = 54. It is the smallest number with this property. Like all other multiples of 6, it is a semiperfect number.

The factorial of 54 is 230,843,697,339,241,380,472,092,742,683,027,581,083,278,564,571,807,941,132,288,000,000,000,000, or approximately 230.843697339241 x 10⁶⁹.

In base 10, 54 is a Harshad number.

The Holt graph has 54 edges.

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").
• The Saros number of the solar eclipse series which began on -1284 July 25 and ended on 32 September. The duration of Saros series 54 was 1316.2 years, and it contained 74 solar eclipses.
• The Saros number of the lunar eclipse series which began on -964 May 14 and ended on 334 July. The duration of Saros series 54 was 1298.1 years, and it contained 73 lunar eclipses.

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 NASCAR driver Lennie Pond.
• A score of 54 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:

• The number of milligrams of caffeine Mountain Dew has.
• +54 The code for international direct dial phone calls to Argentina
• Municipal Okrug 54, a municipal okrug of Nevsky District of Saint Petersburg, Russia
• A broadcast television channel number
• 54, a 1998 film about Studio 54 starring Ryan Phillippe 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

Historical years

54 A.D., 54 B.C., 1954, 2054, etc.