Properties of the Number 31158

Thirty-One Thousand One Hundred Fifty-Eight

Basics

Value: 31157 → 31158 → 31159

Parity: even

Prime: No

Previous Prime: 31153

Next Prime: 31159

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 577

Divisors: 1, 2, 3, 6, 9, 18, 27, 54, 577, 1154

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111100110110110

Octal: 74666

Duodecimal: 16046

Hexadecimal: 79b6

Square: 970820964

Square Root: 176.5162882002678

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

Starting numbers for which the RATS sequence has eventual period 3. A114613

Denominators of continued fraction convergents to sqrt(416). A41791

First differences of A160644. A160646

Number of Sidon subsets of {1,...,n} of size 6. A241690

a(n) = ∑_k=1..n k²*sigma₂(k), where sigma₂ is A001157. A364268

Number of (n+1) X 6 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly one clockwise edge increases. A207047

Numbers k such that 4·10^k + 79 is prime. A281645

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X3 or 3X2 subblock having exactly one clockwise edge increases. A207050

Twin lucky numbers (lower terms). A31158

G.f. A(x) satisfies [x^2·n] A(x)^5·n = 5 and [x^2·n+1] A(x)^5·n+2 = [x^2·n+1] A(x)^5·n+3 for n >= 1. A377097