Properties of the Number -222643

Two Hundred Twenty-Two Thousand Six Hundred Forty-Three

Basics

Value: -222644 → -222643 → -222642

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 222643

Divisors: 1, 222643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110010110110011

Octal: -662663

Duodecimal: -A8A17

Hexadecimal: -365b3

Square: 49569905449

Square Root: 471.85061195255435

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

Largest squarefree number k such that Q(sqrt(-k)) has class number n. A38552

Let p be the n-th odd prime. Then a(n) is the least prime congruent to 3 modulo 8 such that Legendre(-a(n), q) = -1 for all odd primes q <= p. A1986

Records in A001986. A94845

Largest prime p==3 (mod 8) such that Q(sqrt(-p)) has class number 2n+1. A2149

Greatest number, not divisible by 4, having exactly n partitions into three positive squares. A95812

Greatest number, not divisible by 4, having exactly n partitions into three squares. A95811

Primes p such that 2, 3, 5, 7, ..., 37 are all quadratic nonresidues modulo p. A306501

Largest number k such that C(-k) is the cyclic group of order n, where C(D) is the class group of the quadratic field with discriminant D; or 0 if no such k exists. A357600

Greatest number, not divisible by 4, having exactly n partitions into three distinct positive squares. A96021