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
Senary	1306
Octal	668
Duodecimal	4612
Hexadecimal	3616
Vigesimal	2E20
Base 36	1I36

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

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 + 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.

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

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