22222225 has 12 divisors (see below), whose sum is σ = 27968944. Its totient is φ = 17511120.

The previous prime is 22222223. The next prime is 22222253. The reversal of 22222225 is 52222222.

It is not a de Polignac number, because 22222225 - 2¹ = 22222223 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22222223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4959 + ... + 8308.

Almost surely, 2^22222225 is an apocalyptic number.

22222225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22222225 is a deficient number, since it is larger than the sum of its proper divisors (5746719).

22222225 is a wasteful number, since it uses less digits than its factorization.

22222225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13344 (or 13339 counting only the distinct ones).

The product of its digits is 640, while the sum is 19.

The square root of 22222225 is about 4714.0455025381. The cubic root of 22222225 is about 281.1442334816.

Adding to 22222225 its reverse (52222222), we get a palindrome (74444447).

The spelling of 22222225 in words is "twenty-two million, two hundred twenty-two thousand, two hundred twenty-five".