13221622 has 16 divisors (see below), whose sum is σ = 20619360. Its totient is φ = 6350848.

The previous prime is 13221599. The next prime is 13221623. The reversal of 13221622 is 22612231.

It is a super-2 number, since 2×13221622² = 349622576621768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13221622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14463 + ... + 15349.

It is an arithmetic number, because the mean of its divisors is an integer number (1288710).

Almost surely, 2^13221622 is an apocalyptic number.

13221622 is a deficient number, since it is larger than the sum of its proper divisors (7397738).

13221622 is a wasteful number, since it uses less digits than its factorization.

13221622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175.

The product of its digits is 288, while the sum is 19.

The square root of 13221622 is about 3636.1548371872. The cubic root of 13221622 is about 236.4621199874.

Adding to 13221622 its reverse (22612231), we get a palindrome (35833853).

The spelling of 13221622 in words is "thirteen million, two hundred twenty-one thousand, six hundred twenty-two".