57507139 has 16 divisors (see below), whose sum is σ = 61524736. Its totient is φ = 53654400.

The previous prime is 57507127. The next prime is 57507143. The reversal of 57507139 is 93170575.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 57507139 - 2⁷ = 57507011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57507098 and 57507107.

It is not an unprimeable number, because it can be changed into a prime (57507119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207469 + ... + 207745.

It is an arithmetic number, because the mean of its divisors is an integer number (3845296).

Almost surely, 2^57507139 is an apocalyptic number.

57507139 is a deficient number, since it is larger than the sum of its proper divisors (4017597).

57507139 is a wasteful number, since it uses less digits than its factorization.

57507139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526.

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 57507139 is about 7583.3461611613. The cubic root of 57507139 is about 385.9881044595.

The spelling of 57507139 in words is "fifty-seven million, five hundred seven thousand, one hundred thirty-nine".