Properties of the Number -31954

Thirty-One Thousand Nine Hundred Fifty-Four

Basics

Value: -31955 → -31954 → -31953

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 13 × 1229

Divisors: 1, 2, 13, 26, 1229, 2458, 15977, 31954

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -111110011010010

Octal: -76322

Duodecimal: -165AA

Hexadecimal: -7cd2

Square: 1021058116

Square Root: 178.7568180517879

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

Number of partitions of n such that (least part) <= (multiplicity of greatest part). A240179

Number of acute triangles, distinct up to congruence, on a centered hexagonal grid of size n. A241232

Expansion of (g/(2 - g²))², where g = 1+x·g² is the g.f. of A000108. A391493

Sum of n plus its prime factors associated with A020700. A20905

Numbers n such that 4·10ⁿ + 2·R_n + 1 is prime, where R_n = 11...1 is the repunit (A002275) of length n. A102985

Number of (4+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7. A252309

G.f. A(x) satisfies A(x) = ( 1 + 4·x/(1 - x·A(x)) )^1/2. A372016

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 14. A31602

Numbers k such that (2⁶⁴ - 189)*10^k + 1 is prime. A209250