13111138 has 16 divisors (see below), whose sum is σ = 20015424. Its totient is φ = 6440560.

The previous prime is 13111129. The next prime is 13111139. The reversal of 13111138 is 83111131.

It is not an unprimeable number, because it can be changed into a prime (13111139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42003 + ... + 42313.

It is an arithmetic number, because the mean of its divisors is an integer number (1250964).

Almost surely, 2^13111138 is an apocalyptic number.

13111138 is a deficient number, since it is larger than the sum of its proper divisors (6904286).

13111138 is a wasteful number, since it uses less digits than its factorization.

13111138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617.

The product of its digits is 72, while the sum is 19.

The square root of 13111138 is about 3620.9305433825. The cubic root of 13111138 is about 235.8016263677.

Adding to 13111138 its reverse (83111131), we get a palindrome (96222269).

The spelling of 13111138 in words is "thirteen million, one hundred eleven thousand, one hundred thirty-eight".