222221232 has 50 divisors (see below), whose sum is σ = 643176468. Its totient is φ = 74073312.

The previous prime is 222221227. The next prime is 222221257. The reversal of 222221232 is 232122222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 84438 + ... + 87029.

Almost surely, 2^222221232 is an apocalyptic number.

It is an amenable number.

222221232 is an abundant number, since it is smaller than the sum of its proper divisors (420955236).

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

222221232 is a wasteful number, since it uses less digits than its factorization.

222221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171487 (or 171472 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 222221232 is about 14907.0866368986. The cubic root of 222221232 is about 605.7059645994.

Adding to 222221232 its reverse (232122222), we get a palindrome (454343454).

The spelling of 222221232 in words is "two hundred twenty-two million, two hundred twenty-one thousand, two hundred thirty-two".