115115100 has 72 divisors (see below), whose sum is σ = 334561920. Its totient is φ = 30559680.

The previous prime is 115115093. The next prime is 115115111. The reversal of 115115100 is 1511511.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 115115100.

It is a congruent number.

It is an unprimeable number.

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, 78171 + ... + 79629.

Almost surely, 2^115115100 is an apocalyptic number.

115115100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115115100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167280960).

115115100 is an abundant number, since it is smaller than the sum of its proper divisors (219446820).

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

115115100 is a wasteful number, since it uses less digits than its factorization.

115115100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739 (or 1732 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 15.

The square root of 115115100 is about 10729.1705177987. The cubic root of 115115100 is about 486.4565981054.

Adding to 115115100 its reverse (1511511), we get a palindrome (116626611).

The spelling of 115115100 in words is "one hundred fifteen million, one hundred fifteen thousand, one hundred".