13221208 has 96 divisors (see below), whose sum is σ = 33730560. Its totient is φ = 4717440.

The previous prime is 13221199. The next prime is 13221209. The reversal of 13221208 is 80212231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221209) 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 23 ways as a sum of consecutive naturals, for example, 104041 + ... + 104167.

It is an arithmetic number, because the mean of its divisors is an integer number (351360).

Almost surely, 2^13221208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13221208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16865280).

13221208 is an abundant number, since it is smaller than the sum of its proper divisors (20509352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13221208 is a wasteful number, since it uses less digits than its factorization.

13221208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 13221208 is about 3636.0979084728. The cubic root of 13221208 is about 236.4596519004.

Adding to 13221208 its reverse (80212231), we get a palindrome (93433439).

The spelling of 13221208 in words is "thirteen million, two hundred twenty-one thousand, two hundred eight".