13182321 has 4 divisors (see below), whose sum is σ = 17576432. Its totient is φ = 8788212.

The previous prime is 13182287. The next prime is 13182329. The reversal of 13182321 is 12328131.

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 not a de Polignac number, because 13182321 - 2⁹ = 13181809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13182329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2197051 + ... + 2197056.

It is an arithmetic number, because the mean of its divisors is an integer number (4394108).

Almost surely, 2^13182321 is an apocalyptic number.

It is an amenable number.

13182321 is a deficient number, since it is larger than the sum of its proper divisors (4394111).

13182321 is an equidigital number, since it uses as much as digits as its factorization.

13182321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4394110.

The product of its digits is 288, while the sum is 21.

The square root of 13182321 is about 3630.7466174328. The cubic root of 13182321 is about 236.2275945270.

The spelling of 13182321 in words is "thirteen million, one hundred eighty-two thousand, three hundred twenty-one".