13115611 has 2 divisors, whose sum is σ = 13115612. Its totient is φ = 13115610.

The previous prime is 13115591. The next prime is 13115621. The reversal of 13115611 is 11651131.

It is a strong prime.

It is an emirp because it is prime and its reverse (11651131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13115611 - 2⁵ = 13115579 is a prime.

It is not a weakly prime, because it can be changed into another prime (13115621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6557805 + 6557806.

It is an arithmetic number, because the mean of its divisors is an integer number (6557806).

Almost surely, 2^13115611 is an apocalyptic number.

13115611 is a deficient number, since it is larger than the sum of its proper divisors (1).

13115611 is an equidigital number, since it uses as much as digits as its factorization.

13115611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90, while the sum is 19.

The square root of 13115611 is about 3621.5481496178. The cubic root of 13115611 is about 235.8284387047.

Adding to 13115611 its reverse (11651131), we get a palindrome (24766742).

The spelling of 13115611 in words is "thirteen million, one hundred fifteen thousand, six hundred eleven".