221242204 has 6 divisors (see below), whose sum is σ = 387173864. Its totient is φ = 110621100.

The previous prime is 221242201. The next prime is 221242211. The reversal of 221242204 is 402242122.

It is a super-2 number, since 2×221242204² = 97896225661555232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221242201) by changing a digit.

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, 27655272 + ... + 27655279.

Almost surely, 2^221242204 is an apocalyptic number.

It is an amenable number.

221242204 is a deficient number, since it is larger than the sum of its proper divisors (165931660).

221242204 is a wasteful number, since it uses less digits than its factorization.

221242204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55310555 (or 55310553 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 221242204 is about 14874.2127186618. The cubic root of 221242204 is about 604.8151464939.

Adding to 221242204 its reverse (402242122), we get a palindrome (623484326).

The spelling of 221242204 in words is "two hundred twenty-one million, two hundred forty-two thousand, two hundred four".