Properties of the Number 31142

Thirty-One Thousand One Hundred Forty-Two

Basics

Value: 31141 → 31142 → 31143

Parity: even

Prime: No

Previous Prime: 31139

Next Prime: 31147

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 23 × 677

Divisors: 1, 2, 23, 46, 677, 1354, 15571, 31142

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111100110100110

Octal: 74646

Duodecimal: 16032

Hexadecimal: 79a6

Square: 969824164

Square Root: 176.47096078392048

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

Ratio from A049102. A49106

E.g.f. satisfies: log(A(x)) = exp(x·A(x)²) - 1. A349598

Principal diagonal of the convolution array A213836. A213837

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-1000 pattern in any orientation. A146414

Numbers that are equal to the sum of the number of divisors of their first k arithmetic derivatives, for some k. A269459

Position of rightmost 0 (including leading 0) in 2ⁿ increases. A31142

Number of permutations of the prime indices of n with at least one non-singleton run, or non-separations. A336107

a(n) is the smallest number whose Collatz ('3x+1') trajectory crosses its initial value exactly n times. A301937

Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column minus the sum of the minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A257148