Properties of the Number -51381

Fifty-One Thousand Three Hundred Eighty-One

Basics

Value: -51382 → -51381 → -51380

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 11 × 173

Divisors: 1, 3, 9, 11, 27, 33, 99, 173, 297, 519

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1100100010110101

Octal: -144265

Duodecimal: -25899

Hexadecimal: -c8b5

Square: 2640007161

Square Root: 226.67377439836307

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 k such that 2^k-1 + k is prime. A61422

a(1)=1; a(n) = ∑_{1<=k<n, gcd(k,n(n+1)/2)=1} a(k). A125597

Number of equivalence classes of 132-avoiding permutations of [n], where two permutations are equivalent if they have the same set of pure descents. A295704