Properties of the Number -221646

Two Hundred Twenty-One Thousand Six Hundred Forty-Six

Basics

Value: -221647 → -221646 → -221645

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 17 × 41 × 53

Divisors: 1, 2, 3, 6, 17, 34, 41, 51, 53, 82

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110000111001110

Octal: -660716

Duodecimal: -A8326

Hexadecimal: -361ce

Square: 49126949316

Square Root: 470.7929481205087

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

Integer part of the blowup factor for A025587(n). A61523

a(n) = ∑_k=1..n (-1)^k+1 * floor(n/k)⁴. A344722