Properties of the Number -255

Two Hundred Fifty-Five

Basics

Value: -256 → -255 → -254

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 17

Divisors: 1, 3, 5, 15, 17, 51, 85, 255

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111111

Octal: -377

Duodecimal: -193

Hexadecimal: -ff

Square: 65025

Square Root: 15.968719422671311

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

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

Expansion of q^1/24 * η(q) / η(q²) in powers of q. A81362

Triangle read by rows: The n-th derivative of the logistic function written in terms of y, where y = 1/(1 + exp(-x)). A163626

Values of n such that L(1) and N(1) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A226921

Expansion of ∏_{k > 0} 1/(1 + x^prime(k)). A48165

Matrix inverse of triangle A022166. A135950

a(n) = 1 - n⁸. A24006

Inverse Euler transform of the sum-of-divisors or σ function A000203. A320780

Dirichlet inverse of A003961, where A003961(n) is fully multiplicative with a(prime(k)) = prime(k+1). A346234

Triangle T that satisfies the matrix products: C*[T^-1]*C = T and T*[C^-1]*T = C, where C is Pascal's triangle. A118801

a(n) = (-1)ⁿ * (1 - 2ⁿ). A225883