Properties of the Number -212981

Two Hundred Twelve Thousand Nine Hundred Eighty-One

Basics

Value: -212982 → -212981 → -212980

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 212981

Divisors: 1, 212981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -110011111111110101

Octal: -637765

Duodecimal: -A3305

Hexadecimal: -33ff5

Square: 45360906361

Square Root: 461.4986457184896

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

Primes of the form p² + p - 1 when p is prime. A53185

Primes of the form n²-n-1 (for some n) such that p²-p-1 is also prime. A237642

Primes of the form (p*(q-1) + (p-1)*q)/2, where p and q are consecutive odd primes. A99911