Properties of the Number 31866

Thirty-One Thousand Eight Hundred Sixty-Six

Basics

Value: 31865 → 31866 → 31867

Parity: even

Prime: No

Previous Prime: 31859

Next Prime: 31873

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 47 × 113

Divisors: 1, 2, 3, 6, 47, 94, 113, 141, 226, 282

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111110001111010

Octal: 76172

Duodecimal: 16536

Hexadecimal: 7c7a

Square: 1015441956

Square Root: 178.51050389262812

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

G.f.: A(q) = exp( ∑_n>=1 A162552(n) * 3·A038500(n) * qⁿ/n ). A161808

Number of (n+1) X 5 0..2 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors. A186467

Number of (n+1)X9 0..2 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors. A186471

Number of partitions of 2·n into exactly n prime powers (including 1). A341154

Numbers k such that (29·10^k + 259)/9 is prime. A284741

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors. A186472

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 98 ones. A31866

T(n,m)=Number of (n+1)X5 0..m arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors. A189174