22911225 has 12 divisors (see below), whose sum is σ = 37880016. Its totient is φ = 12219280.

The previous prime is 22911199. The next prime is 22911227. The reversal of 22911225 is 52211922.

It is not a de Polignac number, because 22911225 - 2⁵ = 22911193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22911195 and 22911204.

It is not an unprimeable number, because it can be changed into a prime (22911227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152667 + ... + 152816.

It is an arithmetic number, because the mean of its divisors is an integer number (3156668).

Almost surely, 2^22911225 is an apocalyptic number.

22911225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22911225 is a deficient number, since it is larger than the sum of its proper divisors (14968791).

22911225 is a wasteful number, since it uses less digits than its factorization.

22911225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305496 (or 305491 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 22911225 is about 4786.5671414909. The cubic root of 22911225 is about 284.0203359438.

The spelling of 22911225 in words is "twenty-two million, nine hundred eleven thousand, two hundred twenty-five".