111555115 has 24 divisors (see below), whose sum is σ = 159358320. Its totient is φ = 74708928.

The previous prime is 111555113. The next prime is 111555131. The reversal of 111555115 is 511555111.

It is not a de Polignac number, because 111555115 - 2¹ = 111555113 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 111555115.

It is not an unprimeable number, because it can be changed into a prime (111555113) 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 23 ways as a sum of consecutive naturals, for example, 5241 + ... + 15829.

It is an arithmetic number, because the mean of its divisors is an integer number (6639930).

Almost surely, 2^111555115 is an apocalyptic number.

111555115 is a deficient number, since it is larger than the sum of its proper divisors (47803205).

111555115 is a wasteful number, since it uses less digits than its factorization.

111555115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10651 (or 10644 counting only the distinct ones).

The product of its digits is 625, while the sum is 25.

The square root of 111555115 is about 10561.9654894342. The cubic root of 111555115 is about 481.3893701028.

The spelling of 111555115 in words is "one hundred eleven million, five hundred fifty-five thousand, one hundred fifteen".