Properties of the Number -251

Two Hundred Fifty-One

Basics

Value: -252 → -251 → -250

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 251

Divisors: 1, 251

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111011

Octal: -373

Duodecimal: -18B

Hexadecimal: -fb

Square: 63001

Square Root: 15.84297951775486

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 square of continued fraction 1/ ( 1+q/ ( 1+q²/ ( 1+q³/ ( 1+q⁴/... )))). A55101

First term of the n-th differences of the powers of primes. Inverse zero-based binomial transform of A000961. A377054

Triangle composed of generalized Catalan numbers. A64334

a(n) = 1 + 3·n - 2·n². A168244

Expansion of (1-x-x^N)/((1-x)(1-x²)(1-x³)...(1-x^N)) for N = 3. A60022

Dirichlet inverse of function f(n) = 1+(A003415(n)*A276086(n)), where A003415 is the arithmetic derivative and A276086 is the primorial base exp-function. A359603

Matrix inverse of triangle A107862. A107865

E.g.f. A(x) satisfies A(x) = exp( 1/(1 - x/A(x)³) - 1 ). A361097

G.f. A(x) satisfies A(x) = 1 + x / ((1+x)^7/2*A(x)^5/2). A366500

Expansion of ∏_j>=1 (1 - x^j)/(1 - x^4·j)⁴. A286953