115133111 has 4 divisors (see below), whose sum is σ = 115549032. Its totient is φ = 114717192.

The previous prime is 115133093. The next prime is 115133113. The reversal of 115133111 is 111331511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115133111 - 2¹⁸ = 114870967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115133111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115133113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207545 + ... + 208098.

It is an arithmetic number, because the mean of its divisors is an integer number (28887258).

Almost surely, 2^115133111 is an apocalyptic number.

115133111 is a deficient number, since it is larger than the sum of its proper divisors (415921).

115133111 is an equidigital number, since it uses as much as digits as its factorization.

115133111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415920.

The product of its digits is 45, while the sum is 17.

The square root of 115133111 is about 10730.0098322415. The cubic root of 115133111 is about 486.4819672443.

Adding to 115133111 its reverse (111331511), we get a palindrome (226464622).

The spelling of 115133111 in words is "one hundred fifteen million, one hundred thirty-three thousand, one hundred eleven".