54 (number)

← 53 54 55 →
← 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
Roman numeral	LIV
Binary	1101102
Ternary	20003
Quaternary	3124
Quinary	2045
Octal	668
Duodecimal	4612
Hexadecimal	3616
Vigesimal	2E20
Base 36	1I36

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: $7^2 + 2^2 + 1^2 = 6^2 + 2(3^2) = 2(5^2) + 2^2 = 54$. 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.

The equation $2\sin\left(54^\circ\right) = \phi$ results in the golden ratio.

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 in 12 ounces of Mountain Dew.
• +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, 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