22245172 has 12 divisors (see below), whose sum is σ = 38964996. Its totient is φ = 11112320.

The previous prime is 22245161. The next prime is 22245187. The reversal of 22245172 is 27154222.

It can be written as a sum of positive squares in 2 ways, for example, as 10995856 + 11249316 = 3316^2 + 3354^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4422 + ... + 8002.

It is an arithmetic number, because the mean of its divisors is an integer number (3247083).

Almost surely, 2^22245172 is an apocalyptic number.

It is an amenable number.

22245172 is a deficient number, since it is larger than the sum of its proper divisors (16719824).

22245172 is a wasteful number, since it uses less digits than its factorization.

22245172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138 (or 5136 counting only the distinct ones).

The product of its digits is 2240, while the sum is 25.

The square root of 22245172 is about 4716.4787712869. The cubic root of 22245172 is about 281.2409714303.

Adding to 22245172 its reverse (27154222), we get a palindrome (49399394).

It can be divided in two parts, 2224 and 5172, that added together give a square (7396 = 86²).

The spelling of 22245172 in words is "twenty-two million, two hundred forty-five thousand, one hundred seventy-two".