57520657 has 6 divisors (see below), whose sum is σ = 60707778. Its totient is φ = 54492912.

The previous prime is 57520649. The next prime is 57520669. The reversal of 57520657 is 75602575.

57520657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 53231616 + 4289041 = 7296^2 + 2071^2 .

It is not a de Polignac number, because 57520657 - 2³ = 57520649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57520157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79308 + ... + 80029.

It is an arithmetic number, because the mean of its divisors is an integer number (10117963).

Almost surely, 2^57520657 is an apocalyptic number.

It is an amenable number.

57520657 is a deficient number, since it is larger than the sum of its proper divisors (3187121).

57520657 is a wasteful number, since it uses less digits than its factorization.

57520657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159375 (or 159356 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 37.

The square root of 57520657 is about 7584.2374039847. The cubic root of 57520657 is about 386.0183463767.

The spelling of 57520657 in words is "fifty-seven million, five hundred twenty thousand, six hundred fifty-seven".