13032321 has 4 divisors (see below), whose sum is σ = 17376432. Its totient is φ = 8688212.

The previous prime is 13032317. The next prime is 13032337. The reversal of 13032321 is 12323031.

13032321 is digitally balanced in base 2 and base 4, because in such bases 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 13032321 - 2² = 13032317 is a prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 13032321.

It is not an unprimeable number, because it can be changed into a prime (13032391) 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, 2172051 + ... + 2172056.

It is an arithmetic number, because the mean of its divisors is an integer number (4344108).

Almost surely, 2^13032321 is an apocalyptic number.

It is an amenable number.

13032321 is a deficient number, since it is larger than the sum of its proper divisors (4344111).

13032321 is an equidigital number, since it uses as much as digits as its factorization.

13032321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344110.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 13032321 is about 3610.0306092885. The cubic root of 13032321 is about 235.3281728563.

Adding to 13032321 its reverse (12323031), we get a palindrome (25355352).

The spelling of 13032321 in words is "thirteen million, thirty-two thousand, three hundred twenty-one".