Properties of the Number 56857

Fifty-Six Thousand Eight Hundred Fifty-Seven

Basics

Value: 56856 → 56857 → 56858

Parity: odd

Prime: Yes

Previous Prime: 56843

Next Prime: 56873

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 56857

Divisors: 1, 56857

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1101111000011001

Octal: 157031

Duodecimal: 28AA1

Hexadecimal: de19

Square: 3232718449

Square Root: 238.447059113758

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 equal to an octagonal number plus 1. A285792

Smallest prime p == 1 (mod 8) such that Q(sqrt(p)) has class number 2n+1. A355876

9·n analog to Keith numbers. A282764

Smallest p == 1 (mod 4) such that Q(sqrt(p)) has class number 2n+1. A355878

Primes of the form 2·x³ + 3·x² + 5·x + 7. A78625

Integers n such that n is prime and·is prime, where (x,y) is the smallest solution to the Pell equation with D = n. A109748

Primes p such that 2·p⁴+-9 are also prime. A174365

Number of (n+4) X 6 binary arrays with every 5 X 5 subblock commuting with each horizontal and vertical neighbor 5 X 5 subblock. A186602

Primes having only {5, 6, 7, 8} as digits. A386196

Primes p such that p² + 1 has more divisors than p² - 1. A358879