13216244 has 6 divisors (see below), whose sum is σ = 23128434. Its totient is φ = 6608120.

The previous prime is 13216243. The next prime is 13216249. The reversal of 13216244 is 44261231.

It can be written as a sum of positive squares in only one way, i.e., 11222500 + 1993744 = 3350^2 + 1412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13216241) 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 as a sum of consecutive naturals, namely, 1652027 + ... + 1652034.

It is an arithmetic number, because the mean of its divisors is an integer number (3854739).

Almost surely, 2^13216244 is an apocalyptic number.

It is an amenable number.

13216244 is a deficient number, since it is larger than the sum of its proper divisors (9912190).

13216244 is a wasteful number, since it uses less digits than its factorization.

13216244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304065 (or 3304063 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 13216244 is about 3635.4152445078. The cubic root of 13216244 is about 236.4300546895.

Adding to 13216244 its reverse (44261231), we get a palindrome (57477475).

The spelling of 13216244 in words is "thirteen million, two hundred sixteen thousand, two hundred forty-four".