57522220 has 48 divisors (see below), whose sum is σ = 146180160. Its totient is φ = 18561024.

The previous prime is 57522217. The next prime is 57522233. The reversal of 57522220 is 2222575.

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, 9705 + ... + 14464.

It is an arithmetic number, because the mean of its divisors is an integer number (3045420).

Almost surely, 2^57522220 is an apocalyptic number.

It is an amenable number.

57522220 is an abundant number, since it is smaller than the sum of its proper divisors (88657940).

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

57522220 is a wasteful number, since it uses less digits than its factorization.

57522220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24202 (or 24200 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 57522220 is about 7584.3404459452. The cubic root of 57522220 is about 386.0218427508.

Adding to 57522220 its reverse (2222575), we get a palindrome (59744795).

The spelling of 57522220 in words is "fifty-seven million, five hundred twenty-two thousand, two hundred twenty".