Properties of the Number 53131

Fifty-Three Thousand One Hundred Thirty-One

Basics

Value: 53130 → 53131 → 53132

Parity: odd

Prime: No

Previous Prime: 53129

Next Prime: 53147

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 13 × 61 × 67

Divisors: 1, 13, 61, 67, 793, 871, 4087, 53131

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100111110001011

Octal: 147613

Duodecimal: 268B7

Hexadecimal: cf8b

Square: 2822903161

Square Root: 230.50162689230635

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

a(n) = a(n-1) + a(n-2) + 2 where a(0) = a(1) = 1. A111314

Strong pseudoprimes to base 9. A20235

a(n) = binomial(n + 4, n - 1) + 1. A323228

G.f. satisfies: A(x) = 1 + x·A(x/A(-x)). A211768

Strong pseudoprimes to base 22. A20248

Strong pseudoprimes to base 75. A20301

Diagonal sums of the triangle A132047. A144707

Odd composite squarefree numbers k such that r = 2*(p - 2 + k/p)/(p-1) is an integer for each prime divisor p of k. A180248

"Strong impostors" not divisible by 4: Those numbers s ≠= 0 (mod 4) such that λ(s) | 2(s-1), where λ is the Carmichael function (A002322). A318555

Binomial coefficients C(2·n-8,9). A53131