222215522 has 4 divisors (see below), whose sum is σ = 333323286. Its totient is φ = 111107760.

The previous prime is 222215519. The next prime is 222215549. The reversal of 222215522 is 225512222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 140873161 + 81342361 = 11869^2 + 9019^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55553879 + ... + 55553882.

Almost surely, 2^222215522 is an apocalyptic number.

222215522 is a deficient number, since it is larger than the sum of its proper divisors (111107764).

222215522 is a wasteful number, since it uses less digits than its factorization.

222215522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111107763.

The product of its digits is 1600, while the sum is 23.

The square root of 222215522 is about 14906.8951160193. The cubic root of 222215522 is about 605.7007766603.

Adding to 222215522 its reverse (225512222), we get a palindrome (447727744).

The spelling of 222215522 in words is "two hundred twenty-two million, two hundred fifteen thousand, five hundred twenty-two".