57552220 has 24 divisors (see below), whose sum is σ = 131847408. Its totient is φ = 20928000.

The previous prime is 57552217. The next prime is 57552239. The reversal of 57552220 is 2225575.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130581 + ... + 131020.

It is an arithmetic number, because the mean of its divisors is an integer number (5493642).

Almost surely, 2^57552220 is an apocalyptic number.

It is an amenable number.

57552220 is an abundant number, since it is smaller than the sum of its proper divisors (74295188).

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

57552220 is a wasteful number, since it uses less digits than its factorization.

57552220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261621 (or 261619 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 57552220 is about 7586.3179474631. The cubic root of 57552220 is about 386.0889393882.

Adding to 57552220 its reverse (2225575), we get a palindrome (59777795).

The spelling of 57552220 in words is "fifty-seven million, five hundred fifty-two thousand, two hundred twenty".