13111161 has 16 divisors (see below), whose sum is σ = 20668800. Its totient is φ = 7233408.

The previous prime is 13111139. The next prime is 13111177. The reversal of 13111161 is 16111131.

13111161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13111161 - 2⁵ = 13111129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13111161.

It is not an unprimeable number, because it can be changed into a prime (13111181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10156 + ... + 11373.

It is an arithmetic number, because the mean of its divisors is an integer number (1291800).

Almost surely, 2^13111161 is an apocalyptic number.

It is an amenable number.

13111161 is a deficient number, since it is larger than the sum of its proper divisors (7557639).

13111161 is a wasteful number, since it uses less digits than its factorization.

13111161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21568.

The product of its digits is 18, while the sum is 15.

The square root of 13111161 is about 3620.9337193602. The cubic root of 13111161 is about 235.8017642513.

Adding to 13111161 its reverse (16111131), we get a palindrome (29222292).

The spelling of 13111161 in words is "thirteen million, one hundred eleven thousand, one hundred sixty-one".