22252225 has 24 divisors (see below), whose sum is σ = 28491480. Its totient is φ = 17233920.

The previous prime is 22252213. The next prime is 22252229. The reversal of 22252225 is 52225222.

It can be written as a sum of positive squares in 12 ways, for example, as 7568001 + 14684224 = 2751^2 + 3832^2 .

It is not a de Polignac number, because 22252225 - 2²¹ = 20155073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22252196 and 22252205.

It is not an unprimeable number, because it can be changed into a prime (22252229) 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 23 ways as a sum of consecutive naturals, for example, 162357 + ... + 162493.

It is an arithmetic number, because the mean of its divisors is an integer number (1187145).

Almost surely, 2^22252225 is an apocalyptic number.

22252225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22252225 is a deficient number, since it is larger than the sum of its proper divisors (6239255).

22252225 is a wasteful number, since it uses less digits than its factorization.

22252225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 304 counting only the distinct ones).

The product of its digits is 1600, while the sum is 22.

The square root of 22252225 is about 4717.2264096607. The cubic root of 22252225 is about 281.2706914818.

Adding to 22252225 its reverse (52225222), we get a palindrome (74477447).

The spelling of 22252225 in words is "twenty-two million, two hundred fifty-two thousand, two hundred twenty-five".