57320057 has 4 divisors (see below), whose sum is σ = 57343476. Its totient is φ = 57296640.

The previous prime is 57320033. The next prime is 57320059. The reversal of 57320057 is 75002375.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8934121 + 48385936 = 2989^2 + 6956^2 .

It is a cyclic number.

It is not a de Polignac number, because 57320057 - 2¹⁰ = 57319033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57320059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7544 + ... + 13097.

It is an arithmetic number, because the mean of its divisors is an integer number (14335869).

Almost surely, 2^57320057 is an apocalyptic number.

It is an amenable number.

57320057 is a deficient number, since it is larger than the sum of its proper divisors (23419).

57320057 is a wasteful number, since it uses less digits than its factorization.

57320057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23418.

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 57320057 is about 7571.0010566635. The cubic root of 57320057 is about 385.5690847481.

The spelling of 57320057 in words is "fifty-seven million, three hundred twenty thousand, fifty-seven".