Properties of the Number 31660

Thirty-One Thousand Six Hundred Sixty

Basics

Value: 31659 → 31660 → 31661

Parity: even

Prime: No

Previous Prime: 31657

Next Prime: 31663

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 1583

Divisors: 1, 2, 4, 5, 10, 20, 1583, 3166, 6332, 7915

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101110101100

Octal: 75654

Duodecimal: 163A4

Hexadecimal: 7bac

Square: 1002355600

Square Root: 177.93257149830663

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

Sum of the fourth largest parts in the partitions of n into 7 parts. A308930

Number of ways to place 4 nonattacking wazirs on a 4 X n board. A172230

Numbers k such that σ(k) = σ(k - d(k)). A277273

Interprimes which are of the form s·prime, s=20. A75295

Numbers n such that n⁹+9 and n⁹-9 are prime. A239505

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 72. A31660