657564222 has 48 divisors (see below), whose sum is σ = 1571216400. Its totient is φ = 182794752.

The previous prime is 657564161. The next prime is 657564223. The reversal of 657564222 is 222465756.

657564222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657564223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19347 + ... + 41102.

It is an arithmetic number, because the mean of its divisors is an integer number (32733675).

Almost surely, 2^657564222 is an apocalyptic number.

657564222 is an abundant number, since it is smaller than the sum of its proper divisors (913652178).

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

657564222 is a wasteful number, since it uses less digits than its factorization.

657564222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60505 (or 60498 counting only the distinct ones).

The product of its digits is 201600, while the sum is 39.

The square root of 657564222 is about 25643.0150723350. The cubic root of 657564222 is about 869.5863722779.

The spelling of 657564222 in words is "six hundred fifty-seven million, five hundred sixty-four thousand, two hundred twenty-two".