Properties of the Number 31906

Thirty-One Thousand Nine Hundred Six

Basics

Value: 31905 → 31906 → 31907

Parity: even

Prime: No

Previous Prime: 31891

Next Prime: 31907

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 7 × 43 × 53

Divisors: 1, 2, 7, 14, 43, 53, 86, 106, 301, 371

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111110010100010

Octal: 76242

Duodecimal: 1656A

Hexadecimal: 7ca2

Square: 1017992836

Square Root: 178.62250698050343

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

Integers that are Rhonda numbers to base 16. A100975

a(n) = ∑_i=0..n digsum(i)³, where digsum(i) = A007953(i). A231688

Irregular triangle read by rows: T(n,k) is the number of free polyaboloes (or polytans) with n cells of which 2·k share a hypotenuse in pairs (making up k squares), 0 <= k <= n/2. A391191

Triangle read by rows: T(n,k) is the number of free polyaboloes (or polytans) with n cells (counted as in A390996) of which k are square cells consisting of two triangles sharing a hypotenuse, 0 <= k <= n. A391192

a(n) = prime(6·n - 5). A31906

a(n) = ∏_{i=1..n, j=1..n} (i² + j). A324442