Properties of the Number -21665

Twenty-One Thousand Six Hundred Sixty-Five

Basics

Value: -21666 → -21665 → -21664

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 7 × 619

Divisors: 1, 5, 7, 35, 619, 3095, 4333, 21665

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101010010100001

Octal: -52241

Duodecimal: -10655

Hexadecimal: -54a1

Square: 469372225

Square Root: 147.19035294474975

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 n-th antidiagonal of A082191. A82195

First differences of A260443. A277197

Number of circles in an n X n grid passing through at least three points. A355884