13565313 has 20 divisors (see below), whose sum is σ = 20382208. Its totient is φ = 8991000.

The previous prime is 13565309. The next prime is 13565317. The reversal of 13565313 is 31356531.

13565313 is a `hidden beast` number, since 1 + 3 + 5 + 653 + 1 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (13565309) and next prime (13565317).

It is not a de Polignac number, because 13565313 - 2² = 13565309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13565317) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17688 + ... + 18438.

Almost surely, 2^13565313 is an apocalyptic number.

It is an amenable number.

13565313 is a deficient number, since it is larger than the sum of its proper divisors (6816895).

13565313 is an equidigital number, since it uses as much as digits as its factorization.

13565313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 977 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 13565313 is about 3683.1118636284. Note that the first 3 decimals coincide. The cubic root of 13565313 is about 238.4935325172.

The spelling of 13565313 in words is "thirteen million, five hundred sixty-five thousand, three hundred thirteen".