13181112 has 48 divisors (see below), whose sum is σ = 40800240. Its totient is φ = 3765888.

The previous prime is 13181083. The next prime is 13181123. The reversal of 13181112 is 21118131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12573 + ... + 13580.

It is an arithmetic number, because the mean of its divisors is an integer number (850005).

Almost surely, 2^13181112 is an apocalyptic number.

13181112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13181112 is an abundant number, since it is smaller than the sum of its proper divisors (27619128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13181112 is a wasteful number, since it uses less digits than its factorization.

13181112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26172 (or 26165 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

The square root of 13181112 is about 3630.5801189342. The cubic root of 13181112 is about 236.2203725339.

Adding to 13181112 its reverse (21118131), we get a palindrome (34299243).

The spelling of 13181112 in words is "thirteen million, one hundred eighty-one thousand, one hundred twelve".