Properties of the Number -31945

Thirty-One Thousand Nine Hundred Forty-Five

Basics

Value: -31946 → -31945 → -31944

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 6389

Divisors: 1, 5, 6389, 31945

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111110011001001

Octal: -76311

Duodecimal: -165A1

Hexadecimal: -7cc9

Square: 1020483025

Square Root: 178.7316424139833

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) = ∑_{k=0..floor(2·n/7)} binomial(2·k,2·n-7·k). A392430

Lexicographically earliest increasing sequence of positive integers such that A001222(a(i)+a(j)) = A001222(a(i)) + A001222(a(j)) for all 1<=i<j. A59363

a(n) = 66·n² + 1. A158689

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of e.g.f. B(x)^k, where B(x) is the e.g.f. of A384720. A384722

Numbers k such that the continued fraction for sqrt(k) has period 89. A20428

Numbers k such that 36^k - 6^k - 1 is prime. A265484