Properties of the Number -31930

Thirty-One Thousand Nine Hundred Thirty

Basics

Value: -31931 → -31930 → -31929

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 31 × 103

Divisors: 1, 2, 5, 10, 31, 62, 103, 155, 206, 310

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111110010111010

Octal: -76272

Duodecimal: -1658A

Hexadecimal: -7cba

Square: 1019524900

Square Root: 178.68967513541457

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) = binomial(n,4) + binomial(n,2). A55795

9-gonal (or enneagonal) pyramidal numbers: a(n) = n*(n+1)*(7·n-4)/6. A7584

Numbers k such that k and k+1 are both terms in A377732. A377733

a(n) = (2·n³ + 5·n² - 17·n)/2. A162259

Number of -n..n arrays x(0..6) of 7 elements with zero sum and no two consecutive declines, no adjacent equal elements, and no element more than one greater than the previous (random base sawtooth pattern). A200185

Even 9-gonal (nonagonal) pyramidal numbers. A218329

a(1) = 2. For n>1, a(n) = smallest m such that m == 0 (mod prime(n)), m + 1 == 0 (mod prime(n+1)) and m-1 == 0 (mod prime(n-1)). A78455