22251250 has 40 divisors (see below), whose sum is σ = 47684736. Its totient is φ = 7626000.

The previous prime is 22251239. The next prime is 22251263. The reversal of 22251250 is 5215222.

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 19 ways as a sum of consecutive naturals, for example, 7479 + ... + 10021.

Almost surely, 2^22251250 is an apocalyptic number.

22251250 is an abundant number, since it is smaller than the sum of its proper divisors (25433486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22251250 is an equidigital number, since it uses as much as digits as its factorization.

22251250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572 (or 2557 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 22251250 is about 4717.1230639024. The cubic root of 22251250 is about 281.2665833843.

Adding to 22251250 its reverse (5215222), we get a palindrome (27466472).

The spelling of 22251250 in words is "twenty-two million, two hundred fifty-one thousand, two hundred fifty".