57139147 has 16 divisors (see below), whose sum is σ = 62782720. Its totient is φ = 51687072.

The previous prime is 57139133. The next prime is 57139151. The reversal of 57139147 is 74193175.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57139147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57139547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185968 + ... + 186274.

It is an arithmetic number, because the mean of its divisors is an integer number (3923920).

Almost surely, 2^57139147 is an apocalyptic number.

57139147 is a deficient number, since it is larger than the sum of its proper divisors (5643573).

57139147 is a wasteful number, since it uses less digits than its factorization.

57139147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562.

The product of its digits is 26460, while the sum is 37.

The square root of 57139147 is about 7559.0440533179. The cubic root of 57139147 is about 385.1630208593.

The spelling of 57139147 in words is "fifty-seven million, one hundred thirty-nine thousand, one hundred forty-seven".