57171516 has 12 divisors (see below), whose sum is σ = 133400232. Its totient is φ = 19057168.

The previous prime is 57171511. The next prime is 57171529. The reversal of 57171516 is 61517175.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57171511) 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, 2382135 + ... + 2382158.

It is an arithmetic number, because the mean of its divisors is an integer number (11116686).

Almost surely, 2^57171516 is an apocalyptic number.

It is an amenable number.

57171516 is an abundant number, since it is smaller than the sum of its proper divisors (76228716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57171516 is a wasteful number, since it uses less digits than its factorization.

57171516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764300 (or 4764298 counting only the distinct ones).

The product of its digits is 7350, while the sum is 33.

The square root of 57171516 is about 7561.1848277899. The cubic root of 57171516 is about 385.2357380126.

The spelling of 57171516 in words is "fifty-seven million, one hundred seventy-one thousand, five hundred sixteen".