22213225 has 12 divisors (see below), whose sum is σ = 27702220. Its totient is φ = 17668800.

The previous prime is 22213183. The next prime is 22213259. The reversal of 22213225 is 52231222.

It can be written as a sum of positive squares in 6 ways, for example, as 385641 + 21827584 = 621^2 + 4672^2 .

It is not a de Polignac number, because 22213225 - 2¹³ = 22205033 is a prime.

It is a congruent 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, 2071 + ... + 6979.

Almost surely, 2^22213225 is an apocalyptic number.

22213225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22213225 is a deficient number, since it is larger than the sum of its proper divisors (5488995).

22213225 is a wasteful number, since it uses less digits than its factorization.

22213225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100 (or 5095 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The square root of 22213225 is about 4713.0908117710. The cubic root of 22213225 is about 281.1062738898.

Adding to 22213225 its reverse (52231222), we get a palindrome (74444447).

The spelling of 22213225 in words is "twenty-two million, two hundred thirteen thousand, two hundred twenty-five".