57111071 has 4 divisors (see below), whose sum is σ = 57283944. Its totient is φ = 56938200.

The previous prime is 57111031. The next prime is 57111079. The reversal of 57111071 is 17011175.

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 57111071 - 2¹⁰ = 57110047 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 (57111079) 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, 85940 + ... + 86601.

It is an arithmetic number, because the mean of its divisors is an integer number (14320986).

Almost surely, 2^57111071 is an apocalyptic number.

57111071 is a deficient number, since it is larger than the sum of its proper divisors (172873).

57111071 is a wasteful number, since it uses less digits than its factorization.

57111071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172872.

The product of its (nonzero) digits is 245, while the sum is 23.

The square root of 57111071 is about 7557.1867119981. The cubic root of 57111071 is about 385.0999257124.

The spelling of 57111071 in words is "fifty-seven million, one hundred eleven thousand, seventy-one".