Properties of the Number 81554

Eighty-One Thousand Five Hundred Fifty-Four

Basics

Value: 81553 → 81554 → 81555

Parity: even

Prime: No

Previous Prime: 81553

Next Prime: 81559

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 11 ² × 337

Divisors: 1, 2, 11, 22, 121, 242, 337, 674, 3707, 7414

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111010010010

Octal: 237222

Duodecimal: 3B242

Hexadecimal: 13e92

Square: 6651054916

Square Root: 285.57660968643773

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 tilings of a 5 X n rectangle using n pentominoes of shapes U, Y, Z. A352421

Number of n X 3 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A281760

a(n) = sqrt(2)*( (3+2·sqrt(2))ⁿ - (3-2·sqrt(2))ⁿ ). A81554