13031313 has 4 divisors (see below), whose sum is σ = 17375088. Its totient is φ = 8687540.

The previous prime is 13031309. The next prime is 13031329. The reversal of 13031313 is 31313031.

13031313 is digitally balanced in base 3, 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 13031313 - 2² = 13031309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13031292 and 13031301.

It is not an unprimeable number, because it can be changed into a prime (13031383) 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, 2171883 + ... + 2171888.

It is an arithmetic number, because the mean of its divisors is an integer number (4343772).

Almost surely, 2^13031313 is an apocalyptic number.

It is an amenable number.

13031313 is a deficient number, since it is larger than the sum of its proper divisors (4343775).

13031313 is an equidigital number, since it uses as much as digits as its factorization.

13031313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4343774.

The product of its (nonzero) digits is 81, while the sum is 15.

The square root of 13031313 is about 3609.8909955842. The cubic root of 13031313 is about 235.3221054563.

Adding to 13031313 its reverse (31313031), we get a palindrome (44344344).

The spelling of 13031313 in words is "thirteen million, thirty-one thousand, three hundred thirteen".