Properties of the Number 51820

Fifty-One Thousand Eight Hundred Twenty

Basics

Value: 51819 → 51820 → 51821

Parity: even

Prime: No

Previous Prime: 51817

Next Prime: 51827

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 2591

Divisors: 1, 2, 4, 5, 10, 20, 2591, 5182, 10364, 12955

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1100101001101100

Octal: 145154

Duodecimal: 25BA4

Hexadecimal: ca6c

Square: 2685312400

Square Root: 227.6400667720865

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

Starts of runs of 3 consecutive lazy-tribonacci-Niven numbers (A352107). A352109

a(n) = n*(67·n - 89)/2. A263227

Expansion of 1/((1 - x - x⁵)² - 4·x⁶). A375285

[ n(n-1)(n-2)(n-3)/11 ]. A11921

Number of n-digit numbers with nonzero multiplicative digital root 9. A51820