Properties of the Number 31395

Thirty-One Thousand Three Hundred Ninety-Five

Basics

Value: 31394 → 31395 → 31396

Parity: odd

Prime: No

Previous Prime: 31393

Next Prime: 31397

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 13 × 23

Divisors: 1, 3, 5, 7, 13, 15, 21, 23, 35, 39

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101010100011

Octal: 75243

Duodecimal: 16203

Hexadecimal: 7aa3

Square: 985646025

Square Root: 177.1863425888124

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

Structured rhombic dodecahedral numbers (vertex structure 9). A100157

Odd infinitary abundant numbers. A127666

Odd unitary abundant numbers. A129485

Odd bi-unitary abundant numbers: odd numbers k such that bsigma(k) > 2·k, where bsigma is the sum of the bi-unitary divisors function (A188999). A293186

Odd squarefree abundant numbers. A112643

T(n,k) is the number of arrays of n+2 elements from {0,1,...,k} with no two consecutive ascents. A200785

Primitive, odd, squarefree abundant numbers. A249263

Expansion of 1/((1 - x - x³)² - 4·x⁴). A375278

For a rational number p/q let f(p/q) = p·q divided by the sum of digits of p and q; a(n) is obtained by iterating f, starting at n/1, until an integer is reached, or if no integer is ever reached then a(n) = 0. A59175

Odd numbers with exactly 5 distinct prime factors. A46391