13224391 has 2 divisors, whose sum is σ = 13224392. Its totient is φ = 13224390.

The previous prime is 13224347. The next prime is 13224457. The reversal of 13224391 is 19342231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13224391 - 2⁹ = 13223879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13224331) 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, 6612195 + 6612196.

It is an arithmetic number, because the mean of its divisors is an integer number (6612196).

Almost surely, 2^13224391 is an apocalyptic number.

13224391 is a deficient number, since it is larger than the sum of its proper divisors (1).

13224391 is an equidigital number, since it uses as much as digits as its factorization.

13224391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 13224391 is about 3636.5355766168. The cubic root of 13224391 is about 236.4786262301.

The spelling of 13224391 in words is "thirteen million, two hundred twenty-four thousand, three hundred ninety-one".