15223225 has 12 divisors (see below), whose sum is σ = 19066860. Its totient is φ = 12056000.

The previous prime is 15223213. The next prime is 15223283. The reversal of 15223225 is 52232251.

15223225 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 6 ways, for example, as 2471184 + 12752041 = 1572^2 + 3571^2 .

It is not a de Polignac number, because 15223225 - 2⁷ = 15223097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15223196 and 15223205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 490 + ... + 5539.

It is an arithmetic number, because the mean of its divisors is an integer number (1588905).

Almost surely, 2^15223225 is an apocalyptic number.

It is an amenable number.

15223225 is a deficient number, since it is larger than the sum of its proper divisors (3843635).

15223225 is a wasteful number, since it uses less digits than its factorization.

15223225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140 (or 6135 counting only the distinct ones).

The product of its digits is 1200, while the sum is 22.

The square root of 15223225 is about 3901.6951444212. The cubic root of 15223225 is about 247.8385666788.

Adding to 15223225 its reverse (52232251), we get a palindrome (67455476).

The spelling of 15223225 in words is "fifteen million, two hundred twenty-three thousand, two hundred twenty-five".