22638225 has 12 divisors (see below), whose sum is σ = 37428656. Its totient is φ = 12073680.

The previous prime is 22638211. The next prime is 22638227. The reversal of 22638225 is 52283622.

It is not a de Polignac number, because 22638225 - 2⁵ = 22638193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22638192 and 22638201.

It is not an unprimeable number, because it can be changed into a prime (22638227) 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 11 ways as a sum of consecutive naturals, for example, 150847 + ... + 150996.

Almost surely, 2^22638225 is an apocalyptic number.

22638225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22638225 is a deficient number, since it is larger than the sum of its proper divisors (14790431).

22638225 is a wasteful number, since it uses less digits than its factorization.

22638225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301856 (or 301851 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 22638225 is about 4757.9643756548. The cubic root of 22638225 is about 282.8877386482.

The spelling of 22638225 in words is "twenty-two million, six hundred thirty-eight thousand, two hundred twenty-five".