13111228 has 12 divisors (see below), whose sum is σ = 24709720. Its totient is φ = 6051312.

The previous prime is 13111211. The next prime is 13111229. The reversal of 13111228 is 82211131.

13111228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126018 + ... + 126121.

Almost surely, 2^13111228 is an apocalyptic number.

It is an amenable number.

13111228 is a deficient number, since it is larger than the sum of its proper divisors (11598492).

13111228 is a wasteful number, since it uses less digits than its factorization.

13111228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252156 (or 252154 counting only the distinct ones).

The product of its digits is 96, while the sum is 19.

The square root of 13111228 is about 3620.9429711057. The cubic root of 13111228 is about 235.8021659114.

Adding to 13111228 its reverse (82211131), we get a palindrome (95322359).

The spelling of 13111228 in words is "thirteen million, one hundred eleven thousand, two hundred twenty-eight".