57158791 has 4 divisors (see below), whose sum is σ = 57882400. Its totient is φ = 56435184.

The previous prime is 57158779. The next prime is 57158807. The reversal of 57158791 is 19785175.

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

It is a cyclic number.

It is not a de Polignac number, because 57158791 - 2⁷ = 57158663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57158711) 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, 361686 + ... + 361843.

It is an arithmetic number, because the mean of its divisors is an integer number (14470600).

Almost surely, 2^57158791 is an apocalyptic number.

57158791 is a deficient number, since it is larger than the sum of its proper divisors (723609).

57158791 is an equidigital number, since it uses as much as digits as its factorization.

57158791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723608.

The product of its digits is 88200, while the sum is 43.

The square root of 57158791 is about 7560.3433123106. The cubic root of 57158791 is about 385.2071544985.

The spelling of 57158791 in words is "fifty-seven million, one hundred fifty-eight thousand, seven hundred ninety-one".