Properties of the Number 51257

Fifty-One Thousand Two Hundred Fifty-Seven

Basics

Value: 51256 → 51257 → 51258

Parity: odd

Prime: Yes

Previous Prime: 51241

Next Prime: 51263

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 51257

Divisors: 1, 51257

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100100000111001

Octal: 144071

Duodecimal: 257B5

Hexadecimal: c839

Square: 2627280049

Square Root: 226.40008833920538

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

Primes of the form (p²-2)/7, where p is also a prime number. A165668

[ n(n-1)(n-2)(n-3)/7 ]. A11917

List of primes of the form 25n²-36n+13 with n>=0. A154354

a(1) = 7, a(n) = concatenation of two closest factors of a(n-1) whose product equals a(n-1) or if a(n-1) is a prime then the concatenation of 1 and a(n-1). A63384

Take A000040, omit commas: 23571113171923..., select 5-digit primes seen when scanning from left. A73038

Primes that can be generated by the concatenation in base 7, in ascending order, of two consecutive integers read in base 10. A287308

Numbers formed from binomial coefficients (mod 2+k) interpreted as digits in factorial base. A51257

Number of nX5 0..1 arrays with each 1 adjacent to 1 or 2 king-move neighboring 1s. A295844