22215250 has 16 divisors (see below), whose sum is σ = 41587416. Its totient is φ = 8886000.

The previous prime is 22215241. The next prime is 22215269. The reversal of 22215250 is 5251222.

It can be written as a sum of positive squares in 4 ways, for example, as 9916201 + 12299049 = 3149^2 + 3507^2 .

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 7 ways as a sum of consecutive naturals, for example, 44181 + ... + 44680.

Almost surely, 2^22215250 is an apocalyptic number.

22215250 is a deficient number, since it is larger than the sum of its proper divisors (19372166).

22215250 is an equidigital number, since it uses as much as digits as its factorization.

22215250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88878 (or 88868 counting only the distinct ones).

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

The square root of 22215250 is about 4713.3056340535. The cubic root of 22215250 is about 281.1148156918.

Adding to 22215250 its reverse (5251222), we get a palindrome (27466472).

The spelling of 22215250 in words is "twenty-two million, two hundred fifteen thousand, two hundred fifty".