13322321 has 4 divisors (see below), whose sum is σ = 13472100. Its totient is φ = 13172544.

The previous prime is 13322311. The next prime is 13322341. The reversal of 13322321 is 12322331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 819025 + 12503296 = 905^2 + 3536^2 .

It is a cyclic number.

It is not a de Polignac number, because 13322321 - 2²² = 9128017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13322321.

It is not an unprimeable number, because it can be changed into a prime (13322311) 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, 74756 + ... + 74933.

It is an arithmetic number, because the mean of its divisors is an integer number (3368025).

Almost surely, 2^13322321 is an apocalyptic number.

It is an amenable number.

13322321 is a deficient number, since it is larger than the sum of its proper divisors (149779).

13322321 is an equidigital number, since it uses as much as digits as its factorization.

13322321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149778.

The product of its digits is 216, while the sum is 17.

The square root of 13322321 is about 3649.9754793697. The cubic root of 13322321 is about 237.0609194937.

Adding to 13322321 its reverse (12322331), we get a palindrome (25644652).

The spelling of 13322321 in words is "thirteen million, three hundred twenty-two thousand, three hundred twenty-one".