Properties of the Number 31330

Thirty-One Thousand Three Hundred Thirty

Basics

Value: 31329 → 31330 → 31331

Parity: even

Prime: No

Previous Prime: 31327

Next Prime: 31333

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 13 × 241

Divisors: 1, 2, 5, 10, 13, 26, 65, 130, 241, 482

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101001100010

Octal: 75142

Duodecimal: 1616A

Hexadecimal: 7a62

Square: 981568900

Square Root: 177.00282483621552

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

Numbers of the form m² + 1 that can be expressed in more than one way as j² + k² with j > k > 1. A299708

a(n) = n·F(n-1) + F(n), where F = A000045. A94588

Numbers of the form m² + 1 that can be expressed in more than one way as j² + k² with j > k > 1 and gcd(j,k) = 1. A300166

G.f.: ∏_{k>=1, j>=1} 1/(1 - x^k·j)². A320236

Fibonacci sequence beginning 1, 19. A22109

Numbers whose square is a fourth power plus a prime. A236767

Number of sets of exactly six positive integers <= n having a square element sum. A281866

a(n) = ∑_{i=1..floor((n+1)/4)} a(2·i-1) * a(n-2·i+1), with a(1)=a(2)=1 and a(3)=5. A24729

Numbers n such that n·9ⁿ + 1 is prime. A265013

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 779", based on the 5-celled von Neumann neighborhood. A273540