57171239 has 2 divisors, whose sum is σ = 57171240. Its totient is φ = 57171238.

The previous prime is 57171229. The next prime is 57171251. The reversal of 57171239 is 93217175.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57171239 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 57171199 and 57171208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57171229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28585619 + 28585620.

It is an arithmetic number, because the mean of its divisors is an integer number (28585620).

Almost surely, 2^57171239 is an apocalyptic number.

57171239 is a deficient number, since it is larger than the sum of its proper divisors (1).

57171239 is an equidigital number, since it uses as much as digits as its factorization.

57171239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13230, while the sum is 35.

The square root of 57171239 is about 7561.1665105326. The cubic root of 57171239 is about 385.2351158469.

The spelling of 57171239 in words is "fifty-seven million, one hundred seventy-one thousand, two hundred thirty-nine".