Properties of the Number 81584

Eighty-One Thousand Five Hundred Eighty-Four

Basics

Value: 81583 → 81584 → 81585

Parity: even

Prime: No

Previous Prime: 81569

Next Prime: 81611

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ⁴ × 5099

Divisors: 1, 2, 4, 8, 16, 5099, 10198, 20396, 40792, 81584

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111010110000

Octal: 237260

Duodecimal: 3B268

Hexadecimal: 13eb0

Square: 6655949056

Square Root: 285.62913016707523

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 words of length n in the Weyl group D₃₆. A162388

Number of (-1,0,1) polynomials of degree-n irreducible over the integers. A87610

Number of permutations of 1..n with all sums of 2 through 6 adjacent terms respectively unique. A147728

Number of permutations of 1..n with all sums of 2 through 4 adjacent terms respectively unique. A147726

Number of permutations of 1..n with all sums of 2 through 5 adjacent terms respectively unique. A147727

Number of permutations of 1..n with all sums of 2 through 7 adjacent terms respectively unique. A147729

Number of permutations of 1..n with all sums of 2 through 8 adjacent terms respectively unique. A147730

Number of reduced words of length n in the Weyl group B₃₆. A162150

Fourth row of Pascal-(1,2,1) array A081577. A81584