Properties of the Number 51961

Fifty-One Thousand Nine Hundred Sixty-One

Basics

Value: 51960 → 51961 → 51962

Parity: odd

Prime: No

Previous Prime: 51949

Next Prime: 51971

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 7 × 13 × 571

Divisors: 1, 7, 13, 91, 571, 3997, 7423, 51961

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100101011111001

Octal: 145371

Duodecimal: 260A1

Hexadecimal: caf9

Square: 2699945521

Square Root: 227.9495558232128

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 functions of [n] to [n] that simultaneously avoid the patterns 112 and 221. A93965

Primitive numbers in A158235. A158245

Strong pseudoprimes to base 69. A20295

Strong pseudoprimes to base 90. A20316

Expansion of 1/((1-x)*(1-2x)*(1-6x)*(1-12x)). A21214

Array read by antidiagonals: number of {112,221}-avoiding words. A93966

Smallest number w such that A051953(w) = w - φ(w) is the n-th prime. A51961

Numbers k such that ∑_j=1..k σ(j) is a triangular number, where σ(j) = sum of divisors of j (A000203). A226648