15572225 has 6 divisors (see below), whose sum is σ = 19309590. Its totient is φ = 12457760.

The previous prime is 15572213. The next prime is 15572231. The reversal of 15572225 is 52227551.

15572225 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 3 ways, for example, as 237169 + 15335056 = 487^2 + 3916^2 .

It is not a de Polignac number, because 15572225 - 2⁴ = 15572209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 311420 + ... + 311469.

It is an arithmetic number, because the mean of its divisors is an integer number (3218265).

Almost surely, 2^15572225 is an apocalyptic number.

It is an amenable number.

15572225 is a deficient number, since it is larger than the sum of its proper divisors (3737365).

15572225 is an equidigital number, since it uses as much as digits as its factorization.

15572225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622899 (or 622894 counting only the distinct ones).

The product of its digits is 7000, while the sum is 29.

The square root of 15572225 is about 3946.1658606805. The cubic root of 15572225 is about 249.7182158434.

Adding to 15572225 its reverse (52227551), we get a palindrome (67799776).

The spelling of 15572225 in words is "fifteen million, five hundred seventy-two thousand, two hundred twenty-five".