Properties of the Number 31070

Thirty-One Thousand Seventy

Basics

Value: 31069 → 31070 → 31071

Parity: even

Prime: No

Previous Prime: 31069

Next Prime: 31079

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 × 13 × 239

Divisors: 1, 2, 5, 10, 13, 26, 65, 130, 239, 478

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100101011110

Octal: 74536

Duodecimal: 15B92

Hexadecimal: 795e

Square: 965344900

Square Root: 176.26684316683045

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

Coefficient table of numerator polynomials of the ordinary generating function for the alternating power sums for the numbers 1,2,...,2·n. A196847

Number of dissections of a convex polygon with n+3 sides that have exactly one triangle, and that triangle shares at least one side with the exterior polygon. A255197

Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k peaks of width 1 (i.e., UHD configurations, where U=(0,1), H(1,0), D=(0,-1)), (n>=2, k>=0). A273715

a(n) = ∑_k=1..n 2^k * σ(k), where σ(k) = A000203(k). A324915

Cardinality of the set of equivalence classes of the set X_n of finite integer sequences {x₁ = 0, x₂, ..., x_n} satisfying |x_k - x_k+1| = 1, where two such sequences are deemed equivalent if they are permutations of each other. A254007

Arises in classification of base sequences. A173061

Squarefree composite numbers m such that k - m² < m, where k is the smallest number greater than m² such that rad(k) | m. A362003

Numbers k such that k divides sum of first k primes A007504(k). A45345

Numbers k such that the sum of the first k primes is a square. A33997

G.f. A(x) satisfies: [xⁿ] A(x)ⁿ⁺¹ = [xⁿ] (1 + x·A(x)^2·n+3)ⁿ⁺¹ for n >= 0. A360347