Properties of the Number 31956

Thirty-One Thousand Nine Hundred Fifty-Six

Basics

Value: 31955 → 31956 → 31957

Parity: even

Prime: No

Previous Prime: 31907

Next Prime: 31957

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 2663

Divisors: 1, 2, 3, 4, 6, 12, 2663, 5326, 7989, 10652

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111110011010100

Octal: 76324

Duodecimal: 165B0

Hexadecimal: 7cd4

Square: 1021185936

Square Root: 178.76241215647096

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

Even pseudoprimes to base 37. A130441

Number A(n,k) of endofunctions on [n] such that no element has a preimage of cardinality k; square array A(n,k), n>=0, k>=0, read by antidiagonals. A245405

T(n,k)=Number of nXk binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once. A268886

Partial sums of A255745. A255766

Number of step cyclic shifted sequences using exactly four different symbols. A56417

Number of endofunctions on [n] such that no element has a preimage of cardinality three. A245407

a(n) = smallest k such that li(k) - π(k) >= n, where li(k) is the logarithmic integral and π(x) is the number of primes <= x. A359145

Number of primitive (period n) step cyclic shifted sequences using exactly four different symbols. A56426

G.f. satisfies: A(x) = ∑_n>=0 xⁿ*A(x)^A001951(n), where A001951(n) = [n·sqrt(2)]. A190270

a(n) = 9·n³/2 - 21·n²/2 + 8·n - 4. A232495