57191071 has 4 divisors (see below), whose sum is σ = 65361232. Its totient is φ = 49020912.

The previous prime is 57191053. The next prime is 57191107. The reversal of 57191071 is 17019175.

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 57191071 - 2⁵ = 57191039 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 (57191051) 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, 4085070 + ... + 4085083.

It is an arithmetic number, because the mean of its divisors is an integer number (16340308).

Almost surely, 2^57191071 is an apocalyptic number.

57191071 is a deficient number, since it is larger than the sum of its proper divisors (8170161).

57191071 is an equidigital number, since it uses as much as digits as its factorization.

57191071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8170160.

The product of its (nonzero) digits is 2205, while the sum is 31.

The square root of 57191071 is about 7562.4778346783. The cubic root of 57191071 is about 385.2796551393.

The spelling of 57191071 in words is "fifty-seven million, one hundred ninety-one thousand, seventy-one".