57152220 has 48 divisors (see below), whose sum is σ = 165193728. Its totient is φ = 14748480.

The previous prime is 57152219. The next prime is 57152233. The reversal of 57152220 is 2225175.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13504 + ... + 17223.

It is an arithmetic number, because the mean of its divisors is an integer number (3441536).

Almost surely, 2^57152220 is an apocalyptic number.

It is an amenable number.

57152220 is an abundant number, since it is smaller than the sum of its proper divisors (108041508).

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

57152220 is a wasteful number, since it uses less digits than its factorization.

57152220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30770 (or 30768 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 57152220 is about 7559.9087296078. The cubic root of 57152220 is about 385.1923927376.

Adding to 57152220 its reverse (2225175), we get a palindrome (59377395).

The spelling of 57152220 in words is "fifty-seven million, one hundred fifty-two thousand, two hundred twenty".