Properties of the Number -131

One Hundred Thirty-One

Basics

Value: -132 → -131 → -130

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 5

Digital Root: 5

Palindrome: Yes

Factorization: 131

Divisors: 1, 131

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10000011

Octal: -203

Duodecimal: -AB

Hexadecimal: -83

Square: 17161

Square Root: 11.445523142259598

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

Generalized Gaussian Fibonacci integers. A88137

Expansion of 1/sqrt(1 - 2·x + 5·x²). A98331

Dirichlet inverse of A345000, where A345000(n) = gcd(A003415(n), A003415(A276086(n))), with A003415 the arithmetic derivative, and A276086 the primorial base exp-function. A354347

Expansion of ∏_i>=1 (1-xⁱ)^1/i; also of exp(- ∑_n>=1(d(n)*xⁿ/n)) where d(n) is the number of divisors of n. A28343

Expansion of k(q) = r(q) * r(q²)² in powers of q where r() is the Rogers-Ramanujan continued fraction. A112274

Coefficients of the '6th-order' mock θ function γ(q). A53274

G.f. A(x) satisfies A(x) = x + A(-x)². A143045

Expansion of (1-x-x^N)/((1-x)(1-x²)(1-x³)...(1-x^N)) for N = 4. A60023

Coefficients of polynomials ( (1 -x +sqrt(x))ⁿ + (1 -x -sqrt(x))ⁿ )/2. A61176

Row sums of a number triangle related to the Pell numbers. A110331