57271820 has 12 divisors (see below), whose sum is σ = 120270864. Its totient is φ = 22908720.

The previous prime is 57271789. The next prime is 57271847. The reversal of 57271820 is 2817275.

57271820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×57271820² = 6560122732224800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1431776 + ... + 1431815.

It is an arithmetic number, because the mean of its divisors is an integer number (10022572).

Almost surely, 2^57271820 is an apocalyptic number.

It is an amenable number.

57271820 is an abundant number, since it is smaller than the sum of its proper divisors (62999044).

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

57271820 is a wasteful number, since it uses less digits than its factorization.

57271820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863600 (or 2863598 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 57271820 is about 7567.8147440328. The cubic root of 57271820 is about 385.4608973961.

The spelling of 57271820 in words is "fifty-seven million, two hundred seventy-one thousand, eight hundred twenty".