54 (number)

Look up fifty-four in Wiktionary, the free dictionary.

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

In mathematics

54 is a 19-gonal number.^[1] Twice the third power of three, 54 is a Leyland number.^[2] 54 can be written as the sum of three squares in three different ways: 7² + 2² + 1² = 6² + 3² + 3² = 5² + 5² + 2² = 54. It is the smallest number with this property. Like all other multiples of 6, it is a semiperfect number.^[3]

In base 10, 54 is a Harshad number.^[4]

The Holt graph has 54 edges.

The sine of an angle of 54 degrees is half the golden ratio.

The factorial of 54 is 7071230843697339241♠230843697339241380472092742683027581083278564571807941132288000000000000, or approximately 7071230843697339241♠2.30843697339241×10⁷¹.

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 driven by NASCAR's Lennie Pond. More recently, it is known as the Nationwide Series car number for Kyle Busch.
• 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

References