Properties of the Number 51809

Fifty-One Thousand Eight Hundred Nine

Basics

Value: 51808 → 51809 → 51810

Parity: odd

Prime: No

Previous Prime: 51803

Next Prime: 51817

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 103 × 503

Divisors: 1, 103, 503, 51809

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 1100101001100001

Octal: 145141

Duodecimal: 25B95

Hexadecimal: ca61

Square: 2684172481

Square Root: 227.61590454096128

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

4-step Fibonacci sequence starting with 1,1,0,0. A251703

Composite numbers n such that every divisor of n greater than one contains the digit 0. A243819

Numbers m such that m and m+2 are both brilliant numbers, where brilliant numbers are semiprimes whose prime factors have an equal number of decimal digits, or whose prime factors are equal. A83284

Numbers with nonzero multiplicative digital root 7. A51809