Properties of the Number 31090

Thirty-One Thousand Ninety

Basics

Value: 31089 → 31090 → 31091

Parity: even

Prime: No

Previous Prime: 31081

Next Prime: 31091

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 3109

Divisors: 1, 2, 5, 10, 3109, 6218, 15545, 31090

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111100101110010

Octal: 74562

Duodecimal: 15BAA

Hexadecimal: 7972

Square: 966588100

Square Root: 176.32356620712955

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

a(n) = s(1)*s(n) + s(2)*s(n-1) + ... + s(k)*s(n+1-k), where k = floor((n+1)/2), s = (Fibonacci numbers). A24458

Number of peaks in all bargraphs having semiperimeter n (n>=2). A271941

a(n) = Sum{T(n,k)*T(n,2n-k)}, 0<=k<=n-1, T given by A027926. A27991

Numbers k such that the continued fraction for sqrt(k) has period 47. A20386

Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A254903

Convolution of Fibonacci F(n+1), n>=0, with F(n+10), n>=0. A67978

Position of n-th 2 in A031087. A31090