15222245 has 16 divisors (see below), whose sum is σ = 19217520. Its totient is φ = 11558400.

The previous prime is 15222239. The next prime is 15222247. The reversal of 15222245 is 54222251.

15222245 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 8 ways, for example, as 835396 + 14386849 = 914^2 + 3793^2 .

It is not a de Polignac number, because 15222245 - 2¹⁰ = 15221221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15222245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15222247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7985 + ... + 9705.

It is an arithmetic number, because the mean of its divisors is an integer number (1201095).

Almost surely, 2^15222245 is an apocalyptic number.

It is an amenable number.

15222245 is a deficient number, since it is larger than the sum of its proper divisors (3995275).

15222245 is a wasteful number, since it uses less digits than its factorization.

15222245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816.

The product of its digits is 1600, while the sum is 23.

The square root of 15222245 is about 3901.5695559608. The cubic root of 15222245 is about 247.8332483355.

Adding to 15222245 its reverse (54222251), we get a palindrome (69444496).

The spelling of 15222245 in words is "fifteen million, two hundred twenty-two thousand, two hundred forty-five".