Properties of the Number 57155

Fifty-Seven Thousand One Hundred Fifty-Five

Basics

Value: 57154 → 57155 → 57156

Parity: odd

Prime: No

Previous Prime: 57149

Next Prime: 57163

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 7 × 23 × 71

Divisors: 1, 5, 7, 23, 35, 71, 115, 161, 355, 497

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: Yes

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Representations

Binary: 1101111101000011

Octal: 157503

Duodecimal: 290AB

Hexadecimal: df43

Square: 3266694025

Square Root: 239.07111912566938

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) = 1² + 3² + 5² + 7² + ... + (2·n-1)² = n*(4·n² - 1)/3. A447

Triangle read by rows: T(n,k) is the number of inequivalent colorings of lone-child-avoiding rooted trees with n colored leaves using exactly k colors. A339645

Odd tetrahedral numbers: a(n) = (4·n+1)*(4·n+2)*(4·n+3)/6. A15219

a(n) = binomial(prime(n+2), 3). A126995

a(n) = binomial(3·n+2,3). A228888

Squarefree tetrahedral numbers. A70755

Binomial coefficients C(71,n). A17787

a(n) = 34·n² + 1. A158586

Binomial coefficients C(n,68). A17732

Define b by b(1) = 1 and for n>1, b(n) = b(n-1)+1/(3+1/b(n-1)); sequence gives numerator of b(n). A80988