13185313 has 4 divisors (see below), whose sum is σ = 13506948. Its totient is φ = 12863680.

The previous prime is 13185311. The next prime is 13185317. The reversal of 13185313 is 31358131.

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 6466849 + 6718464 = 2543^2 + 2592^2 .

It is a cyclic number.

It is not a de Polignac number, because 13185313 - 2¹ = 13185311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13185311) 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, 160756 + ... + 160837.

It is an arithmetic number, because the mean of its divisors is an integer number (3376737).

Almost surely, 2^13185313 is an apocalyptic number.

It is an amenable number.

13185313 is a deficient number, since it is larger than the sum of its proper divisors (321635).

13185313 is an equidigital number, since it uses as much as digits as its factorization.

13185313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321634.

The product of its digits is 1080, while the sum is 25.

The square root of 13185313 is about 3631.1586305200. The cubic root of 13185313 is about 236.2454654188.

It can be divided in two parts, 1318531 and 3, that multiplied together give a palindrome (3955593).

The spelling of 13185313 in words is "thirteen million, one hundred eighty-five thousand, three hundred thirteen".