Properties of the Number -205221

Two Hundred Five Thousand Two Hundred Twenty-One

Basics

Value: -205222 → -205221 → -205220

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 67 × 1021

Divisors: 1, 3, 67, 201, 1021, 3063, 68407, 205221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110010000110100101

Octal: -620645

Duodecimal: -9A919

Hexadecimal: -321a5

Square: 42115658841

Square Root: 453.0132448394859

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

a(1) = a(2) = 1, a(3) = 4; thereafter a(n) = a(n-1) + a(n-3). A1609

Expansion of 1/(1-2·x-3·x²+2·x³). A46672

Number of independent vertex sets and vertex covers in the n-antiprism graph. A286910

a(n) = round(cⁿ), where c is the supergolden ratio A092526. A382641