Properties of the Number -54

Fifty-Four

Basics

Value: -55 → -54 → -53

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

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) = 2 - n. A22958

Expansion of 6-dimensional cusp form (η(q) * η(q³))⁶ in powers of q. A7332

a(n) = (n+1)*(2-n)/2. A80956

Dirichlet inverse of σ function (A000203). A46692

Expansion of reciprocal of Hauptmodul for Gamma₀(18). A92848

a(n) = (-1)ⁿ⁺¹ * n. A181983

a(n) = n - (reversal of digits of n). A56965

Triangle read by rows: terms T(n,k) of a binomial decomposition of 2ⁿ-1 as Sum(k=0..n)T(n,k). A244125

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of n as ∑_k=0..n T(n,k)*binomial(n,k). A244130

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of n*(n-1) as Sum(k=0..n)T(n,k)*binomial(n,k). A244138