Properties of the Number 51844

Fifty-One Thousand Eight Hundred Forty-Four

Basics

Value: 51843 → 51844 → 51845

Parity: even

Prime: No

Previous Prime: 51839

Next Prime: 51853

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 13 × 997

Divisors: 1, 2, 4, 13, 26, 52, 997, 1994, 3988, 12961

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 1100101010000100

Octal: 145204

Duodecimal: 26004

Hexadecimal: ca84

Square: 2687800336

Square Root: 227.69277546729498

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 n such that there is no square n-gonal number greater than 1. A188896

Numbers k such that prime(k) * 2^k + 1 is prime. A239742

Number of matchings in rooted plane trees on n nodes. A7859

a(n) = LCM_k=0..n (2^k + 1). A51844

Number of nX4 0..2 arrays avoiding the pattern z-2 z-1 z in any row or column. A206696

The Fibonacci-Catalan Hybrid. Expansion of 1 + x*(2*(x + 1))/(sqrt(1 - 4·y) - 2·x*(x + 1) + 1). Square array read by descending antidiagonals, A(n,k) for n,k >= 0. A323212