Properties of the Number 557

Five Hundred Fifty-Seven

Basics

Value: 556 → 557 → 558

Parity: odd

Prime: Yes

Previous Prime: 547

Next Prime: 563

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 557

Divisors: 1, 557

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1000101101

Octal: 1055

Duodecimal: 3A5

Hexadecimal: 22d

Square: 310249

Square Root: 23.600847442411894

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 x² + xy + 2y², with·and y nonnegative. A106856

Pythagorean primes: primes of the form 4·k + 1. A2144

Numbers k such that 8·10^k - 49 is prime. A271269

Primes of the form 2x² + 2xy + 17y². A139827

Number of partitions of n into prime parts. A607

Primes with primitive root 2. A1122

Primes congruent to 1 or 2 modulo 4; or, primes of form x² + y²; or, -1 is a square mod p. A2313

Primes of the form 3n-1. A3627

Primes of the form 6k-1. A7528

Primes p such that p + 6 is also prime. (Lesser of a pair of sexy primes.) A23201