Properties of the Number -221991

Two Hundred Twenty-One Thousand Nine Hundred Ninety-One

Basics

Value: -221992 → -221991 → -221990

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 11 × 31 ²

Divisors: 1, 3, 7, 11, 21, 31, 33, 77, 93, 217

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110001100100111

Octal: -661447

Duodecimal: -A8573

Hexadecimal: -36327

Square: 49280004081

Square Root: 471.15920876069055

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

Sum of squares of divisors of square numbers. A65827

Expansion of g.f. x/(1-7·x+8·x²). A152268