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From Wikipedia, the free encyclopedia

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

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Transcription

Contents

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.

In science

Astronomy

In sports

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

In other fields

54 is also:

References

  1. ^ "Sloane's A051871 : 19-gonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  2. ^ "Sloane's A076980 : Leyland numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  3. ^ "Sloane's A005835 : Pseudoperfect (or semiperfect) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  4. ^ "Sloane's A005349 : Niven (or Harshad) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
This page was last edited on 9 May 2019, at 20:09
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