22201222 has 4 divisors (see below), whose sum is σ = 33301836. Its totient is φ = 11100610.

The previous prime is 22201217. The next prime is 22201237. The reversal of 22201222 is 22210222.

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

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550304 + ... + 5550307.

It is an arithmetic number, because the mean of its divisors is an integer number (8325459).

Almost surely, 2^22201222 is an apocalyptic number.

22201222 is a deficient number, since it is larger than the sum of its proper divisors (11100614).

22201222 is a wasteful number, since it uses less digits than its factorization.

22201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11100613.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22201222 is about 4711.8172714994. The cubic root of 22201222 is about 281.0556324885.

Adding to 22201222 its reverse (22210222), we get a palindrome (44411444).

The spelling of 22201222 in words is "twenty-two million, two hundred one thousand, two hundred twenty-two".