Properties of the Number 85221

Eighty-Five Thousand Two Hundred Twenty-One

Basics

Value: 85220 → 85221 → 85222

Parity: odd

Prime: No

Previous Prime: 85213

Next Prime: 85223

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 17 × 557

Divisors: 1, 3, 9, 17, 51, 153, 557, 1671, 5013, 9469

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100110011100101

Octal: 246345

Duodecimal: 41399

Hexadecimal: 14ce5

Square: 7262618841

Square Root: 291.92636057745796

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

Numbers k such that (16·10^k - 31)/3 is prime. A270929

Factorial expansions of the entries in A085219. A85221