13131128 has 16 divisors (see below), whose sum is σ = 25917000. Its totient is φ = 6219936.

The previous prime is 13131127. The next prime is 13131133. The reversal of 13131128 is 82113131.

13131128 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 (13131127) 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, 43043 + ... + 43346.

Almost surely, 2^13131128 is an apocalyptic number.

It is an amenable number.

13131128 is a deficient number, since it is larger than the sum of its proper divisors (12785872).

13131128 is a wasteful number, since it uses less digits than its factorization.

13131128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86414 (or 86410 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

The square root of 13131128 is about 3623.6898322014. The cubic root of 13131128 is about 235.9214044515.

Adding to 13131128 its reverse (82113131), we get a palindrome (95244259).

The spelling of 13131128 in words is "thirteen million, one hundred thirty-one thousand, one hundred twenty-eight".