Properties of the Number 15957

Fifteen Thousand Nine Hundred Fifty-Seven

Basics

Value: 15956 → 15957 → 15958

Parity: odd

Prime: No

Previous Prime: 15937

Next Prime: 15959

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 197

Divisors: 1, 3, 9, 27, 81, 197, 591, 1773, 5319, 15957

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11111001010101

Octal: 37125

Duodecimal: 9299

Hexadecimal: 3e55

Square: 254625849

Square Root: 126.3210196285638

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

T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly one horizontal or antidiagonal neighbor. A220562

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+167)² = y². A130608

Numerator of the cumulative frequency of the dropping time in the Collatz iteration. A186109

a(n) = A064835(n)/2. A64836

L-th order palindromes with L > 2. A89381

Numbers k such that the first 9 digits of the k-th Lucas number are 1-9 pandigital. A216489

a(n) = (n+1)*(n³+15·n²+74·n+132)/12. A217947

Number of ways to reciprocally link elements of an 2 X n array either to themselves or to exactly one horizontal or antidiagonal neighbor. A220563

Numbers k such that k divides 9^k + 8^k + 7^k. A57231

Numbers k such that k | 9^k + 1. A15957