222531216 has 40 divisors (see below), whose sum is σ = 579025440. Its totient is φ = 73641216.

The previous prime is 222531193. The next prime is 222531223. The reversal of 222531216 is 612135222.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 10005 + ... + 23348.

It is an arithmetic number, because the mean of its divisors is an integer number (14475636).

Almost surely, 2^222531216 is an apocalyptic number.

It is an amenable number.

222531216 is an abundant number, since it is smaller than the sum of its proper divisors (356494224).

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

222531216 is a wasteful number, since it uses less digits than its factorization.

222531216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33503 (or 33497 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 222531216 is about 14917.4802161759. The cubic root of 222531216 is about 605.9874737360.

Adding to 222531216 its reverse (612135222), we get a palindrome (834666438).

The spelling of 222531216 in words is "two hundred twenty-two million, five hundred thirty-one thousand, two hundred sixteen".