Properties of the Number 51156

Fifty-One Thousand One Hundred Fifty-Six

Basics

Value: 51155 → 51156 → 51157

Parity: even

Prime: No

Previous Prime: 51151

Next Prime: 51157

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 7 ² × 29

Divisors: 1, 2, 3, 4, 6, 7, 9, 12, 14, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100011111010100

Octal: 143724

Duodecimal: 25730

Hexadecimal: c7d4

Square: 2616936336

Square Root: 226.17692189964916

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

4-dimensional pyramidal numbers: a(n) = n²*(n²-1)/12. A2415

Nonsquare numbers whose sum of proper square divisors is a square greater than 1. A232555

Numbers whose sum of proper square divisors is a square greater than 1. A232556

Triangle read by rows: T(n,k) = binomial(n+1,k+1) * binomial(5·n-4·k+1,k) / (n+1), 0<=k<=n. A391048

Cubefree exponential abundant numbers: cubefree numbers k for which A051377(k) > 2·k. A391427

Denominators of continued fraction convergents to sqrt(925). A42789

Triangle read by rows: matrix inverse of A154959. A154960

a(n) = n² * (4·n² - 1) / 3. A187756

The Wiener index of the linear phenylene with n hexagons. A224454

Triangle T(n, k) = n! * binomial(n, k)*( ψ(n-k+1) - ψ(k+1) ), read by rows. A157521