13003321 has 4 divisors (see below), whose sum is σ = 13168000. Its totient is φ = 12838644.

The previous prime is 13003313. The next prime is 13003363. The reversal of 13003321 is 12330031.

13003321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13003321 - 2³ = 13003313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13003301) 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, 82221 + ... + 82378.

It is an arithmetic number, because the mean of its divisors is an integer number (3292000).

Almost surely, 2^13003321 is an apocalyptic number.

It is an amenable number.

13003321 is a deficient number, since it is larger than the sum of its proper divisors (164679).

13003321 is an equidigital number, since it uses as much as digits as its factorization.

13003321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164678.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 13003321 is about 3606.0117858931. The cubic root of 13003321 is about 235.1534895865.

Adding to 13003321 its reverse (12330031), we get a palindrome (25333352).

The spelling of 13003321 in words is "thirteen million, three thousand, three hundred twenty-one".