22212642 has 16 divisors (see below), whose sum is σ = 47038752. Its totient is φ = 6968640.

The previous prime is 22212629. The next prime is 22212649. The reversal of 22212642 is 24621222.

It is not an unprimeable number, because it can be changed into a prime (22212649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108784 + ... + 108987.

It is an arithmetic number, because the mean of its divisors is an integer number (2939922).

Almost surely, 2^22212642 is an apocalyptic number.

22212642 is an abundant number, since it is smaller than the sum of its proper divisors (24826110).

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

22212642 is a wasteful number, since it uses less digits than its factorization.

22212642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217793.

The product of its digits is 768, while the sum is 21.

The square root of 22212642 is about 4713.0289623553. The cubic root of 22212642 is about 281.1038145982.

Adding to 22212642 its reverse (24621222), we get a palindrome (46833864).

The spelling of 22212642 in words is "twenty-two million, two hundred twelve thousand, six hundred forty-two".