13022321 has 8 divisors (see below), whose sum is σ = 14234304. Its totient is φ = 11840400.

The previous prime is 13022311. The next prime is 13022333. The reversal of 13022321 is 12322031.

It is a happy number.

13022321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13022321 - 2⁶ = 13022257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13022296 and 13022305.

It is not an unprimeable number, because it can be changed into a prime (13022311) 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, 6605 + ... + 8346.

It is an arithmetic number, because the mean of its divisors is an integer number (1779288).

Almost surely, 2^13022321 is an apocalyptic number.

It is an amenable number.

13022321 is a deficient number, since it is larger than the sum of its proper divisors (1211983).

13022321 is a wasteful number, since it uses less digits than its factorization.

13022321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15031.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13022321 is about 3608.6453136877. The cubic root of 13022321 is about 235.2679665458.

Adding to 13022321 its reverse (12322031), we get a palindrome (25344352).

The spelling of 13022321 in words is "thirteen million, twenty-two thousand, three hundred twenty-one".