Properties of the Number 51391

Fifty-One Thousand Three Hundred Ninety-One

Basics

Value: 51390 → 51391 → 51392

Parity: odd

Prime: No

Previous Prime: 51383

Next Prime: 51407

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 17 × 3023

Divisors: 1, 17, 3023, 51391

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100100010111111

Octal: 144277

Duodecimal: 258A7

Hexadecimal: c8bf

Square: 2641034881

Square Root: 226.69583145704289

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

Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths ending at each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 9, n >= 2. A214376

Number of signed permutations of length n invariant under the reverse complement and avoiding (-2, -1), (-2, 1), (2, -1). A193776

Convolution of n! and nⁿ. A300519

a(n) = a(n-1) + 6·a(n-3) + 2·a(n-4), with a(0) = a(1) = 1, a(2) = 3, a(3) = 6. A339600

Number of nonisomorphic Steiner triple systems (STS's) S(2,3,v) on v = 6n+1 or 6n+3 points. A51391