1222518228 has 24 divisors (see below), whose sum is σ = 2879204832. Its totient is φ = 403697184.

The previous prime is 1222518211. The next prime is 1222518239. The reversal of 1222518228 is 8228152221.

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, 474775 + ... + 477342.

It is an arithmetic number, because the mean of its divisors is an integer number (119966868).

Almost surely, 2^1222518228 is an apocalyptic number.

It is an amenable number.

1222518228 is an abundant number, since it is smaller than the sum of its proper divisors (1656686604).

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

1222518228 is a wasteful number, since it uses less digits than its factorization.

1222518228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952231 (or 952229 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 1222518228 is about 34964.5281392442. The cubic root of 1222518228 is about 1069.2644165492.

The spelling of 1222518228 in words is "one billion, two hundred twenty-two million, five hundred eighteen thousand, two hundred twenty-eight".