Properties of the Number 81504

Eighty-One Thousand Five Hundred Four

Basics

Value: 81503 → 81504 → 81505

Parity: even

Prime: No

Previous Prime: 81463

Next Prime: 81509

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁵ × 3 ² × 283

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111001100000

Octal: 237140

Duodecimal: 3B200

Hexadecimal: 13e60

Square: 6642902016

Square Root: 285.4890540808877

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 reduced 3 X 3 semimagic squares with magic sum n. A173728

Numbers k such that 3k - 1 divides 3^k - 1. A273614

Smallest number such that the concatenation of first n terms is a proper multiple of the concatenation of first n natural numbers. A74108

Numbers k such that 313·2^k+1 is prime. A322948

Numbers n such that there are no primes of the form 2ⁿ+2ⁱ+1 for 0<i<n. In binary: all 3-bit numbers with size n+1 are composite. A81504