22242225 has 12 divisors (see below), whose sum is σ = 36773936. Its totient is φ = 11862480.

The previous prime is 22242211. The next prime is 22242251. The reversal of 22242225 is 52224222.

It is not a de Polignac number, because 22242225 - 2⁵ = 22242193 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 148207 + ... + 148356.

Almost surely, 2^22242225 is an apocalyptic number.

22242225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22242225 is a deficient number, since it is larger than the sum of its proper divisors (14531711).

22242225 is a wasteful number, since it uses less digits than its factorization.

22242225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296576 (or 296571 counting only the distinct ones).

The product of its digits is 1280, while the sum is 21.

The square root of 22242225 is about 4716.1663456668. The cubic root of 22242225 is about 281.2285514508.

Adding to 22242225 its reverse (52224222), we get a palindrome (74466447).

The spelling of 22242225 in words is "twenty-two million, two hundred forty-two thousand, two hundred twenty-five".