13111144 has 32 divisors (see below), whose sum is σ = 25583040. Its totient is φ = 6294400.

The previous prime is 13111139. The next prime is 13111177. The reversal of 13111144 is 44111131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23007 + ... + 23569.

It is an arithmetic number, because the mean of its divisors is an integer number (799470).

Almost surely, 2^13111144 is an apocalyptic number.

It is an amenable number.

13111144 is a deficient number, since it is larger than the sum of its proper divisors (12471896).

13111144 is a wasteful number, since it uses less digits than its factorization.

13111144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 677 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 13111144 is about 3620.9313718987. The cubic root of 13111144 is about 235.8016623373.

Adding to 13111144 its reverse (44111131), we get a palindrome (57222275).

The spelling of 13111144 in words is "thirteen million, one hundred eleven thousand, one hundred forty-four".