115111215 has 96 divisors (see below), whose sum is σ = 224040960. Its totient is φ = 54432000.

The previous prime is 115111193. The next prime is 115111219. The reversal of 115111215 is 512111511.

It is not a de Polignac number, because 115111215 - 2⁶ = 115111151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115111219) 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 95 ways as a sum of consecutive naturals, for example, 1139665 + ... + 1139765.

It is an arithmetic number, because the mean of its divisors is an integer number (2333760).

Almost surely, 2^115111215 is an apocalyptic number.

115111215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115111215 is a deficient number, since it is larger than the sum of its proper divisors (108929745).

115111215 is a wasteful number, since it uses less digits than its factorization.

115111215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 202 counting only the distinct ones).

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

The square root of 115111215 is about 10728.9894677924. The cubic root of 115111215 is about 486.4511255967.

Adding to 115111215 its reverse (512111511), we get a palindrome (627222726).

The spelling of 115111215 in words is "one hundred fifteen million, one hundred eleven thousand, two hundred fifteen".