Properties of the Number -209381

Two Hundred Nine Thousand Three Hundred Eighty-One

Basics

Value: -209382 → -209381 → -209380

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 209381

Divisors: 1, 209381

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110011000111100101

Octal: -630745

Duodecimal: -A1205

Hexadecimal: -331e5

Square: 43840403161

Square Root: 457.58168669648484

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

Expansion of ∏_n>=1 (1 - x^5·n)²⁴/(1 - xⁿ)²⁵ in powers of x. A278557

Primes p such that, if q,r,s are the next three primes, both p·q*r·s - (p+q+r+s) and p·q*r·s + (p+q+r+s) are primes. A390929