13221443 has 2 divisors, whose sum is σ = 13221444. Its totient is φ = 13221442.

The previous prime is 13221431. The next prime is 13221457. The reversal of 13221443 is 34412231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13221443 - 2⁶ = 13221379 is a prime.

It is not a weakly prime, because it can be changed into another prime (13221413) 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, 6610721 + 6610722.

It is an arithmetic number, because the mean of its divisors is an integer number (6610722).

Almost surely, 2^13221443 is an apocalyptic number.

13221443 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221443 is an equidigital number, since it uses as much as digits as its factorization.

13221443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 20.

The square root of 13221443 is about 3636.1302231906. The cubic root of 13221443 is about 236.4610528740.

Adding to 13221443 its reverse (34412231), we get a palindrome (47633674).

The spelling of 13221443 in words is "thirteen million, two hundred twenty-one thousand, four hundred forty-three".