13220324 has 24 divisors (see below), whose sum is σ = 25181688. Its totient is φ = 6036480.

The previous prime is 13220309. The next prime is 13220329. The reversal of 13220324 is 42302231.

It can be written as a sum of positive squares in 4 ways, for example, as 1537600 + 11682724 = 1240^2 + 3418^2 .

It is not an unprimeable number, because it can be changed into a prime (13220329) by changing a digit.

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, 3734 + ... + 6354.

It is an arithmetic number, because the mean of its divisors is an integer number (1049237).

Almost surely, 2^13220324 is an apocalyptic number.

It is an amenable number.

13220324 is a deficient number, since it is larger than the sum of its proper divisors (11961364).

13220324 is a wasteful number, since it uses less digits than its factorization.

13220324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735 (or 2733 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 13220324 is about 3635.9763475578. The cubic root of 13220324 is about 236.4543817065.

Adding to 13220324 its reverse (42302231), we get a palindrome (55522555).

The spelling of 13220324 in words is "thirteen million, two hundred twenty thousand, three hundred twenty-four".