13221319 has 4 divisors (see below), whose sum is σ = 13380696. Its totient is φ = 13061944.

The previous prime is 13221317. The next prime is 13221337. The reversal of 13221319 is 91312231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91312231 = 23 ⋅3970097.

It is a cyclic number.

It is not a de Polignac number, because 13221319 - 2¹ = 13221317 is a prime.

It is a super-3 number, since 3×13221319³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13221319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79564 + ... + 79729.

It is an arithmetic number, because the mean of its divisors is an integer number (3345174).

Almost surely, 2^13221319 is an apocalyptic number.

13221319 is a deficient number, since it is larger than the sum of its proper divisors (159377).

13221319 is an equidigital number, since it uses as much as digits as its factorization.

13221319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159376.

The product of its digits is 324, while the sum is 22.

The square root of 13221319 is about 3636.1131720561. The cubic root of 13221319 is about 236.4603136389.

The spelling of 13221319 in words is "thirteen million, two hundred twenty-one thousand, three hundred nineteen".