Properties of the Number 81532

Eighty-One Thousand Five Hundred Thirty-Two

Basics

Value: 81531 → 81532 → 81533

Parity: even

Prime: No

Previous Prime: 81527

Next Prime: 81533

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 11 × 17 × 109

Divisors: 1, 2, 4, 11, 17, 22, 34, 44, 68, 109

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111001111100

Octal: 237174

Duodecimal: 3B224

Hexadecimal: 13e7c

Square: 6647467024

Square Root: 285.53808852760784

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 ways to write n as an ordered sum of 10 nonzero triangular numbers. A340955

Symmetric difference of the primitive non-deficient numbers and the primitive Zumkeller numbers. A378538

Numbers that are primitive Zumkeller, but not primitive non-deficient. A378657

Numbers n such that φ(n)=d₁!!*d₂!!*...*d_k!! where d₁ d₂ ... d_k is the decimal expansion of n. A139408

Triangle read by rows: let m be smallest number with n divisors, then row n gives divisors of m. A81532