Properties of the Number 2557

Two Thousand Five Hundred Fifty-Seven

Basics

Value: 2556 → 2557 → 2558

Parity: odd

Prime: Yes

Previous Prime: 2551

Next Prime: 2579

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2557

Divisors: 1, 2557

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111111101

Octal: 4775

Duodecimal: 1591

Hexadecimal: 9fd

Square: 6538249

Square Root: 50.566787519082126

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 p such that (p+1)/2 is prime. A5383

Primes whose digits are primes; primes having only {2, 3, 5, 7} as digits. A19546

Numbers obtained by reinterpreting base-2 representation of n in primorial base: a(0) = 0, a(2n) = A276154(a(n)), a(2n+1) = 1 + A276154(a(n)). A276156

a(n) = 2·n² - n + 1. A130883

Primes of the form m² + 3m + 9, where m can be positive or negative. A5471

Smallest palindrome greater than n in bases n and n+1. A48268

First term of strong prime quartets: prime(m+1)-prime(m) > prime(m+2)-prime(m+1) > prime(m+3)-prime(m+2). A54804

Primes whose base-9 representation is also the base-6 representation of a prime. A235639

Fundamental discriminants of real quadratic number fields with class number 3. A94612

L-toothpick sequence (see Comment lines for definition). A172310