Properties of the Number 81255

Eighty-One Thousand Two Hundred Fifty-Five

Basics

Value: 81254 → 81255 → 81256

Parity: odd

Prime: No

Previous Prime: 81239

Next Prime: 81281

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 5417

Divisors: 1, 3, 5, 15, 5417, 16251, 27085, 81255

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011110101100111

Octal: 236547

Duodecimal: 3B033

Hexadecimal: 13d67

Square: 6602375025

Square Root: 285.0526267200497

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

Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and vertical height (i.e., number of rows) k (1 <= k <= n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column. A121692

a(n) = 361·n² + 2·n. A158309

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 19. A31697

Numbers which have only digits 0 and 1 in bases 3 and 5. A268337

Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically. A254451

Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A254169

Duplicate of A005371. A81255