57491057 has 8 divisors (see below), whose sum is σ = 62055336. Its totient is φ = 52947072.

The previous prime is 57491023. The next prime is 57491117. The reversal of 57491057 is 75019475.

It can be written as a sum of positive squares in 4 ways, for example, as 12988816 + 44502241 = 3604^2 + 6671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57491057 - 2⁸ = 57490801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57491057.

It is not an unprimeable number, because it can be changed into a prime (57491257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1103 + ... + 10779.

It is an arithmetic number, because the mean of its divisors is an integer number (7756917).

Almost surely, 2^57491057 is an apocalyptic number.

It is an amenable number.

57491057 is a deficient number, since it is larger than the sum of its proper divisors (4564279).

57491057 is a wasteful number, since it uses less digits than its factorization.

57491057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10147.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 57491057 is about 7582.2857371640. The cubic root of 57491057 is about 385.9521202928.

The spelling of 57491057 in words is "fifty-seven million, four hundred ninety-one thousand, fifty-seven".