Properties of the Number 51815

Fifty-One Thousand Eight Hundred Fifteen

Basics

Value: 51814 → 51815 → 51816

Parity: odd

Prime: No

Previous Prime: 51803

Next Prime: 51817

Digit Sum: 20

Digital Root: 2

Palindrome: Yes

Factorization: 5 × 43 × 241

Divisors: 1, 5, 43, 215, 241, 1205, 10363, 51815

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100101001100111

Octal: 145147

Duodecimal: 25B9B

Hexadecimal: ca67

Square: 2684794225

Square Root: 227.629084257702

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

Numbers that are palindromic and divisible by 5. A43040

Zeroless numbers n such that n and n - (product of digits of n) are both palindromes. A229761

Palindromes in which the sum of the internal digits = the sum of the external digits. A88285

a(n) is the smallest integer k such that floor((3/2)^k)/floor((3/2)ⁿ) is an integer greater than 1. A65644

Partition the nonnegative integers into minimal groups whose sums are palindromes; this sequence gives the sums. A72482

Number of n-digit numbers with nonzero multiplicative digital root 4. A51815