222215604 has 48 divisors (see below), whose sum is σ = 582675072. Its totient is φ = 65400192.

The previous prime is 222215563. The next prime is 222215639. The reversal of 222215604 is 406512222.

It is a happy number.

It is a super-2 number, since 2×222215604² = 98759549322169632, which contains 22 as substring.

It is a congruent number.

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, 27379 + ... + 34554.

It is an arithmetic number, because the mean of its divisors is an integer number (12139064).

Almost surely, 2^222215604 is an apocalyptic number.

It is an amenable number.

222215604 is an abundant number, since it is smaller than the sum of its proper divisors (360459468).

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

222215604 is a wasteful number, since it uses less digits than its factorization.

222215604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61976 (or 61974 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 222215604 is about 14906.8978664241. The cubic root of 222215604 is about 605.7008511637.

Adding to 222215604 its reverse (406512222), we get a palindrome (628727826).

The spelling of 222215604 in words is "two hundred twenty-two million, two hundred fifteen thousand, six hundred four".