Properties of the Number 54

Fifty-Four

Basics

Value: 53 → 54 → 55

Parity: even

Prime: No

Previous Prime: 53

Next Prime: 59

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³

Divisors: 1, 2, 3, 6, 9, 18, 27, 54

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110

Octal: 66

Duodecimal: 46

Hexadecimal: 36

Square: 2916

Square Root: 7.3484692283495345

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) = σ(n), the sum of the divisors of n. Also called sigma₁(n). A203

The positive integers. Also called the natural numbers, the whole numbers or the counting numbers, but these terms are ambiguous. A27

Expansion of ∏_{m >= 1} (1 + x^m); number of partitions of n into distinct parts; number of partitions of n into odd parts. A9

The composite numbers: numbers n of the form x·y for x > 1 and y > 1. A2808

The nonnegative integers. A1477

The nonnegative even numbers: a(n) = 2n. A5843

Coordination sequence T1 for Zeolite Code ABW and ATN. A8000

Numbers that are not squarefree. Numbers that are divisible by a square greater than 1. The complement of A005117. A13929

Read n backwards (referred to as R(n) in many sequences). A4086

Sum of proper divisors (or aliquot parts) of n: sum of divisors of n that are less than n. A1065

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