22442172 has 24 divisors (see below), whose sum is σ = 54171600. Its totient is φ = 7222656.

The previous prime is 22442153. The next prime is 22442179. The reversal of 22442172 is 27124422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22442179) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31897 + ... + 32592.

It is an arithmetic number, because the mean of its divisors is an integer number (2257150).

Almost surely, 2^22442172 is an apocalyptic number.

It is an amenable number.

22442172 is an abundant number, since it is smaller than the sum of its proper divisors (31729428).

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

22442172 is a wasteful number, since it uses less digits than its factorization.

22442172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64525 (or 64523 counting only the distinct ones).

The product of its digits is 1792, while the sum is 24.

The square root of 22442172 is about 4737.3169621633. The cubic root of 22442172 is about 282.0687423582.

Adding to 22442172 its reverse (27124422), we get a palindrome (49566594).

The spelling of 22442172 in words is "twenty-two million, four hundred forty-two thousand, one hundred seventy-two".