Properties of the Number 51756

Fifty-One Thousand Seven Hundred Fifty-Six

Basics

Value: 51755 → 51756 → 51757

Parity: even

Prime: No

Previous Prime: 51749

Next Prime: 51767

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 19 × 227

Divisors: 1, 2, 3, 4, 6, 12, 19, 38, 57, 76

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100101000101100

Octal: 145054

Duodecimal: 25B50

Hexadecimal: ca2c

Square: 2678683536

Square Root: 227.49945054878705

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 regions formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares). A331766

Row sums in A100781. A100784

G.f.: A(x) = exp( ∑_n>=1 4ⁿ * xⁿ/(n*(1+xⁿ)) ). A259274

Maximum number of 6 sphinx tile shapes in a sphinx tiled hexagon of order n. A291582

a(n) = (7·n + 3)*(7·n + 4). A177071

Number of prime pairs below 10ⁿ having a difference of 38. A93973

Index of the smallest Fibonacci number divisible by prime(n)². A264008

Number of permutations of [n] avoiding {4231, 4123, 1234}. A294770

Ulam numbers that are oblong (or promic) numbers. A379828

Numbers k such that 327·2^k+1 is prime. A322956