Properties of the Number 57148

Fifty-Seven Thousand One Hundred Forty-Eight

Basics

Value: 57147 → 57148 → 57149

Parity: even

Prime: No

Previous Prime: 57143

Next Prime: 57149

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 7 × 13 × 157

Divisors: 1, 2, 4, 7, 13, 14, 26, 28, 52, 91

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101111100111100

Octal: 157474

Duodecimal: 290A4

Hexadecimal: df3c

Square: 3265893904

Square Root: 239.05647868233984

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 unlabeled 2-ary cacti having n polygons. Also number of bicolored plane trees with n edges. A54357

a(n) = ∑_{d∣n, n/d=1 mod 4} d³ - ∑_{d∣n, n/d=3 mod 4} d³. A50471

Difference between successive primes cubed: a(n) = prime(n+1)³ - prime(n)³. A129701

a(n) = ∑_{d∣n, d==1 mod 4} d³ - ∑_{d∣n, d==3 mod 4} d³. A50459

Practical numbers q with q + 2 and q² + 2 both practical. A294225

Numbers k such that 13·4^k + 1 is prime. A2257

A145312(n)/1440. A145346

G.f.: 1/(1 + x + 5·x² - x³ + x⁴). A199805

Palindromes only using 0 and 1 (i.e., base-2 palindromes). A57148