115518 has 16 divisors (see below), whose sum is σ = 248976. Its totient is φ = 35520.

The previous prime is 115513. The next prime is 115523. The reversal of 115518 is 815511.

It is an interprime number because it is at equal distance from previous prime (115513) and next prime (115523).

It is a junction number, because it is equal to n+sod(n) for n = 115494 and 115503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115513) by changing a digit.

115518 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663 + ... + 818.

It is an arithmetic number, because the mean of its divisors is an integer number (15561).

2¹¹⁵⁵¹⁸ is an apocalyptic number.

115518 is an abundant number, since it is smaller than the sum of its proper divisors (133458).

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

115518 is a wasteful number, since it uses less digits than its factorization.

115518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499.

The product of its digits is 200, while the sum is 21.

The square root of 115518 is about 339.8793903725. The cubic root of 115518 is about 48.7023465961.

The spelling of 115518 in words is "one hundred fifteen thousand, five hundred eighteen".