Properties of the Number -22681

Twenty-Two Thousand Six Hundred Eighty-One

Basics

Value: -22682 → -22681 → -22680

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 37 × 613

Divisors: 1, 37, 613, 22681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101100010011001

Octal: -54231

Duodecimal: -11161

Hexadecimal: -5899

Square: 514427761

Square Root: 150.60212481900777

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

Numerators of the partial alternating sums of the reciprocals of the unitary totient function (A047994). A379519

Centered 36-gonal numbers. A195316

Numbers which are the sum of two positive cubes and divisible by 37. A102618

a(n) = n*(n² - 4·n + 5)/2. A162607

Sieve performed by successive iterations of steps where step m is: keep m terms, remove the next 5 and repeat; as m = 1,2,3,.. the remaining terms form this sequence. A112563

Sequence a(n) = 3·A002559(n) - 2 determining the principal reduced indefinite binary quadratic form [1, a(n), -a(n)] for Markoff triples. A324250

Numbers k such that A048138(k) is a prime and sets a new record for such primes. A64440

Numbers n such that gcd(φ(n), n-1) > λ(n). A283656

Composite k that divides 2^k-2 + 3^k-2 + 6^k-2 - 1. A318761

Terms of A024670 that are not in A141805. A141806