Properties of the Number 51909

Fifty-One Thousand Nine Hundred Nine

Basics

Value: 51908 → 51909 → 51910

Parity: odd

Prime: No

Previous Prime: 51907

Next Prime: 51913

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 11 ³ × 13

Divisors: 1, 3, 11, 13, 33, 39, 121, 143, 363, 429

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1100101011000101

Octal: 145305

Duodecimal: 26059

Hexadecimal: cac5

Square: 2694544281

Square Root: 227.83546694928776

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

Number of permutations of [1,2,...,n] with n-1 inversions. A707

a(1)=a(2)=a(3)=1; for n > 3, a(n) = lcm(a(n-1) + a(n-2), a(n-3)). A128485

Number of reduced words of length n in the Weyl group A₁₀. A161458

Concatenation of the 5 prime factors of composite a(n) is a palindrome. A46454

Numbers n such that A001414(n) = sum of composites from the smallest prime factor of n to the largest prime factor of n. A74053

Subset of strict Egyptian numbers - there is a unique representation of 1 as the sum of distinct unit fractions with the sum of denominators being these numbers. A51909