Properties of the Number 81508

Eighty-One Thousand Five Hundred Eight

Basics

Value: 81507 → 81508 → 81509

Parity: even

Prime: No

Previous Prime: 81463

Next Prime: 81509

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 7 × 41 × 71

Divisors: 1, 2, 4, 7, 14, 28, 41, 71, 82, 142

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111001100100

Octal: 237144

Duodecimal: 3B204

Hexadecimal: 13e64

Square: 6643554064

Square Root: 285.49605951746514

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

Practical numbers q with q + 2 and q² + 2 both practical. A294225

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, 1, -1), (1, 0, 1)}. A148768

Coordination sequence for root lattice B₉. A22151

Primes of form 1 + 3^k + 5^k. A81508