13313815 has 4 divisors (see below), whose sum is σ = 15976584. Its totient is φ = 10651048.

The previous prime is 13313809. The next prime is 13313827. The reversal of 13313815 is 51831331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13313815 - 2⁷ = 13313687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13313815.

It is a congruent number.

It is an unprimeable number.

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, 1331377 + ... + 1331386.

It is an arithmetic number, because the mean of its divisors is an integer number (3994146).

Almost surely, 2^13313815 is an apocalyptic number.

13313815 is a deficient number, since it is larger than the sum of its proper divisors (2662769).

13313815 is an equidigital number, since it uses as much as digits as its factorization.

13313815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662768.

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

The square root of 13313815 is about 3648.8100800124. The cubic root of 13313815 is about 237.0104560776.

The spelling of 13313815 in words is "thirteen million, three hundred thirteen thousand, eight hundred fifteen".