115511112 has 48 divisors (see below), whose sum is σ = 317142540. Its totient is φ = 37974528.

The previous prime is 115511111. The next prime is 115511113. The reversal of 115511112 is 211115511.

115511112 is a `hidden beast` number, since 1 + 1 + 551 + 1 + 112 = 666.

It is an interprime number because it is at equal distance from previous prime (115511111) and next prime (115511113).

It can be written as a sum of positive squares in 2 ways, for example, as 115476516 + 34596 = 10746^2 + 186^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115511111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5733 + ... + 16244.

Almost surely, 2^115511112 is an apocalyptic number.

115511112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

115511112 is an abundant number, since it is smaller than the sum of its proper divisors (201631428).

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

115511112 is a wasteful number, since it uses less digits than its factorization.

115511112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22062 (or 22055 counting only the distinct ones).

The product of its digits is 50, while the sum is 18.

The square root of 115511112 is about 10747.6095946959. The cubic root of 115511112 is about 487.0137858409.

Adding to 115511112 its reverse (211115511), we get a palindrome (326626623).

The spelling of 115511112 in words is "one hundred fifteen million, five hundred eleven thousand, one hundred twelve".