22443212 has 12 divisors (see below), whose sum is σ = 42846216. Its totient is φ = 10201440.

The previous prime is 22443139. The next prime is 22443229. The reversal of 22443212 is 21234422.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254993 + ... + 255080.

It is an arithmetic number, because the mean of its divisors is an integer number (3570518).

Almost surely, 2^22443212 is an apocalyptic number.

22443212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22443212 is a deficient number, since it is larger than the sum of its proper divisors (20403004).

22443212 is a wasteful number, since it uses less digits than its factorization.

22443212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510088 (or 510086 counting only the distinct ones).

The product of its digits is 768, while the sum is 20.

The square root of 22443212 is about 4737.4267276656. The cubic root of 22443212 is about 282.0730994374.

Adding to 22443212 its reverse (21234422), we get a palindrome (43677634).

The spelling of 22443212 in words is "twenty-two million, four hundred forty-three thousand, two hundred twelve".