Properties of the Number 82191

Eighty-Two Thousand One Hundred Ninety-One

Basics

Value: 82190 → 82191 → 82192

Parity: odd

Prime: No

Previous Prime: 82189

Next Prime: 82193

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 27397

Divisors: 1, 3, 27397, 82191

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100000100001111

Octal: 240417

Duodecimal: 3B693

Hexadecimal: 1410f

Square: 6755360481

Square Root: 286.6897277545884

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

In a square array, positive integers are entered as follows. Start with a(1, 1)=1. Then enter numbers in this order: a(1, 2), a(2, 1), a(3, 1), a(2, 2), a(1, 3), a(1, 4), a(2, 3), a(3, 2), a(4, 1), a(5, 1), a(4, 2), ... such that every entry is the smallest not yet used and such that every entry greater than 1 has a common divisor with its neighbors (in all directions) which are greater than 1. A82191