Properties of the Number 51894

Fifty-One Thousand Eight Hundred Ninety-Four

Basics

Value: 51893 → 51894 → 51895

Parity: even

Prime: No

Previous Prime: 51893

Next Prime: 51899

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 31 ²

Divisors: 1, 2, 3, 6, 9, 18, 27, 31, 54, 62

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 1100101010110110

Octal: 145266

Duodecimal: 26046

Hexadecimal: cab6

Square: 2692987236

Square Root: 227.80254607883558

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

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors. A205072

Triangle read by rows: T(n,k) (0 <= k <= n) = ∑_i=0..[k/2] (-1)ⁱ*binomial(k,2·i)*(2·i-1)!!*n^k-2·i. A244490

Number of (n+1) X 2 0..1 arrays with the number of rightwards and downwards edge increases in each 2 X 2 subblock differing from the number in all its horizontal and vertical neighbors. A205065

Array read by antidiagonals: T(n,k) is the number of functions f: X->Y, where X is a subset of Y, |X| = n, |Y| = n+k, such that for every·in X, f(f(x)) ≠ x. A334014

Number of unlabeled semiorders on n points and having dimension 3. A293501

Number of monic polynomials with integer coefficients of degree n with all roots in unit disc. A51894

G.f. satisfies: A(x) = ∑_n>=0 ( (1+x)ⁿ - A(x)^1/2 )ⁿ / ( 2 - (1+x)ⁿ * A(x)^1/2 )ⁿ⁺¹. A322735