57252228 has 24 divisors (see below), whose sum is σ = 145733280. Its totient is φ = 17349120.

The previous prime is 57252227. The next prime is 57252233. The reversal of 57252228 is 82225275.

It is a super-2 number, since 2×57252228² = 6555635221927968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (57252227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216733 + ... + 216996.

It is an arithmetic number, because the mean of its divisors is an integer number (6072220).

Almost surely, 2^57252228 is an apocalyptic number.

It is an amenable number.

57252228 is an abundant number, since it is smaller than the sum of its proper divisors (88481052).

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

57252228 is a wasteful number, since it uses less digits than its factorization.

57252228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433747 (or 433745 counting only the distinct ones).

The product of its digits is 22400, while the sum is 33.

The square root of 57252228 is about 7566.5202041625. The cubic root of 57252228 is about 385.4169385392.

The spelling of 57252228 in words is "fifty-seven million, two hundred fifty-two thousand, two hundred twenty-eight".