Properties of the Number 23156

Twenty-Three Thousand One Hundred Fifty-Six

Basics

Value: 23155 → 23156 → 23157

Parity: even

Prime: No

Previous Prime: 23143

Next Prime: 23159

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 7 × 827

Divisors: 1, 2, 4, 7, 14, 28, 827, 1654, 3308, 5789

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101101001110100

Octal: 55164

Duodecimal: 11498

Hexadecimal: 5a74

Square: 536200336

Square Root: 152.17095649301808

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

Numbers n such that σ(n) is a Fibonacci number. A272412

Numbers n such that sopf(n) = sopf(n-1) + sopf(n-2) + sopf(n-3), where sopf(x) = sum of the distinct prime factors of x. A75784

Let p(n) be the n-th prime congruent to 1 mod 4. Then a(n) = the least m for which m²+1=p(n)*k² has a solution. A94048

Chapman's "evil" determinants I. A179071

Numbers that are the sum of seven fourth powers in seven or more ways. A345573

Numbers that are the sum of seven fourth powers in exactly seven ways. A345829

T(n,k)=Number of nXk binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two exactly once. A268766

Smallest integer·satisfying the Pell equation x²-k·y²=-1 for the values of k given in A031396. A130226

Bases b for which there exists an integer y such that y³ in base b looks like [c,d,c,d] for some base-b digits c, d. A290176

a(n) = coefficient of xⁿ in A(x) such that C(x)² + S(x)² = 1 where: C(x) + i·S(x) = ∑_n=-oo..+oo iⁿ * (2·x)^n² * A(x)ⁿ. A357787