Properties of the Number 31290

Thirty-One Thousand Two Hundred Ninety

Basics

Value: 31289 → 31290 → 31291

Parity: even

Prime: No

Previous Prime: 31277

Next Prime: 31307

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 × 7 × 149

Divisors: 1, 2, 3, 5, 6, 7, 10, 14, 15, 21

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 111101000111010

Octal: 75072

Duodecimal: 16136

Hexadecimal: 7a3a

Square: 979064100

Square Root: 176.8897962009115

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) = ∑_d∣n p(d), where p(d) = A000041 = number of partitions of d. A47968

Number of ways to select 2 disjoint point triples from an n X n X n triangular point grid, each point triple forming an 2 X 2 X 2 triangle. A289223

Numbers n for which 2 < A257993(A276086(A276086(n))) < A257993(n), where A276086 converts the primorial base expansion of n into its prime product form, and A257993 returns the index of the least prime not present in its argument. A328762

Least even number m which can be written as sum of 2n primes p(1) < ... < p(2n) < m/2 such that m-p(i) is also prime for i=1,...,2n. A191837

a(n) = (8·n³ + 15·n² + 13·n)/6. A332698

Number of plane partitions of n with 6 parts. A391705

Position of n-th 3 in A007376. A31290