Properties of the Number 8556

Eight Thousand Five Hundred Fifty-Six

Basics

Value: 8555 → 8556 → 8557

Parity: even

Prime: No

Previous Prime: 8543

Next Prime: 8563

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 23 × 31

Divisors: 1, 2, 3, 4, 6, 12, 23, 31, 46, 62

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000101101100

Octal: 20554

Duodecimal: 4B50

Hexadecimal: 216c

Square: 73205136

Square Root: 92.49864863877742

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

a(n) = 2·n*(2·n+1). A2943

Constant term in expansion of (1/2) * ∏_k=-n..n (1 + x^k). A47653

a(n) = (n + 2)*(2·n² - n + 3)/6. A56520

Number of partitions of n such that smaller parts do not occur more frequently than greater parts. A171979

6 times pentagonal numbers: a(n) = 3·n*(3·n-1). A152743

a(n) = prime(n)² - prime(n²). Commutator of (primes, squares) at n. A123914

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A317823

Half the number of ways of placing up to n pawns on a length n chessboard row so that the row balances at its middle. A133406

Greatest number m such that the fractional part of (π-2)^A153717(n) <= 1/m. A153721

a(n) = 25·n² + 25·n + 6. A177059