13315765 has 4 divisors (see below), whose sum is σ = 15978924. Its totient is φ = 10652608.

The previous prime is 13315741. The next prime is 13315787. The reversal of 13315765 is 56751331.

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 9878449 + 3437316 = 3143^2 + 1854^2 .

It is a cyclic number.

It is not a de Polignac number, because 13315765 - 2¹¹ = 13313717 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1331572 + ... + 1331581.

It is an arithmetic number, because the mean of its divisors is an integer number (3994731).

Almost surely, 2^13315765 is an apocalyptic number.

It is an amenable number.

13315765 is a deficient number, since it is larger than the sum of its proper divisors (2663159).

13315765 is an equidigital number, since it uses as much as digits as its factorization.

13315765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663158.

The product of its digits is 9450, while the sum is 31.

The square root of 13315765 is about 3649.0772806286. The cubic root of 13315765 is about 237.0220267112.

The spelling of 13315765 in words is "thirteen million, three hundred fifteen thousand, seven hundred sixty-five".