Properties of the Number 31108

Thirty-One Thousand One Hundred Eight

Basics

Value: 31107 → 31108 → 31109

Parity: even

Prime: No

Previous Prime: 31091

Next Prime: 31121

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 7 × 11 × 101

Divisors: 1, 2, 4, 7, 11, 14, 22, 28, 44, 77

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100110000100

Octal: 74604

Duodecimal: 16004

Hexadecimal: 7984

Square: 967707664

Square Root: 176.3746013461122

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

a(n) is the solution to the postage stamp problem with 5 denominations and n stamps. A1210

Expansion of e.g.f. sinh(log(1+x))*cosh(x). A9573

a(n) = (n+1)*(n+2)/2 * ∑_{k=0..floor(n/2)} n!/(n-2·k)!. A114633

Triangle read by rows: T(n, k) is the number of squarefree integers·such that x<=primorial(n) and ω(n) = k with 0<=k<=n. A261215

Numbers k that divide ∑_i=1..k (i - d(i)), where d(n) is the number of divisors of n (A000005). A362864

Number of permutations of 1..n with both permutation and its inverse having exactly 2 maxima. A180392

Number of mutual-visibility sets in the n X 4 grid graph. A392420

Position of n-th 7 in A031100. A31108

Numbers n such that the decimal digits of n are not present in k·n, k=2..9. A175637