57171772 has 12 divisors (see below), whose sum is σ = 114343600. Its totient is φ = 24502176.

The previous prime is 57171769. The next prime is 57171791. The reversal of 57171772 is 27717175.

57171772 is an admirable number.

It is a super-2 number, since 2×57171772² = 6537223027239968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020897 + ... + 1020952.

Almost surely, 2^57171772 is an apocalyptic number.

It is an amenable number.

57171772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

57171772 is a wasteful number, since it uses less digits than its factorization.

57171772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041860 (or 2041858 counting only the distinct ones).

The product of its digits is 24010, while the sum is 37.

The square root of 57171772 is about 7561.2017563348. The cubic root of 57171772 is about 385.2363130088.

The spelling of 57171772 in words is "fifty-seven million, one hundred seventy-one thousand, seven hundred seventy-two".