15222250 has 16 divisors (see below), whose sum is σ = 28496520. Its totient is φ = 6088800.

The previous prime is 15222247. The next prime is 15222257. The reversal of 15222250 is 5222251.

15222250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1212201 + 14010049 = 1101^2 + 3743^2 .

It is not an unprimeable number, because it can be changed into a prime (15222257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30195 + ... + 30694.

Almost surely, 2^15222250 is an apocalyptic number.

15222250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15222250 is a deficient number, since it is larger than the sum of its proper divisors (13274270).

15222250 is an equidigital number, since it uses as much as digits as its factorization.

15222250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60906 (or 60896 counting only the distinct ones).

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

The square root of 15222250 is about 3901.5701967285. The cubic root of 15222250 is about 247.8332754705.

Subtracting from 15222250 its reverse (5222251), we obtain a palindrome (9999999).

The spelling of 15222250 in words is "fifteen million, two hundred twenty-two thousand, two hundred fifty".