13163321 has 4 divisors (see below), whose sum is σ = 13937652. Its totient is φ = 12388992.

The previous prime is 13163309. The next prime is 13163323. The reversal of 13163321 is 12336131.

It is a happy number.

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 11806096 + 1357225 = 3436^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 13163321 - 2²² = 8969017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13163293 and 13163302.

It is not an unprimeable number, because it can be changed into a prime (13163323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387140 + ... + 387173.

It is an arithmetic number, because the mean of its divisors is an integer number (3484413).

Almost surely, 2^13163321 is an apocalyptic number.

It is an amenable number.

13163321 is a deficient number, since it is larger than the sum of its proper divisors (774331).

13163321 is an equidigital number, since it uses as much as digits as its factorization.

13163321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774330.

The product of its digits is 324, while the sum is 20.

The square root of 13163321 is about 3628.1291322113. The cubic root of 13163321 is about 236.1140464297.

Adding to 13163321 its reverse (12336131), we get a palindrome (25499452).

The spelling of 13163321 in words is "thirteen million, one hundred sixty-three thousand, three hundred twenty-one".