115

This number is a composite.

115 (or 5! - 5) is the smallest composite number of the form p! - p, where p is prime. [Bakker]

115 = 23 x (2 + 3). [Sladcik]

The smallest integer n, in which pi(n) occurs at the nth decimal place of π. [Wu]

The smallest three-digit integer, abc, such that (abc)/(a*b*c) is also prime. [Patterson]

An emirpimes, ending with the smallest emirpimes. It implies that two emirpimes can be found in its reversal. [Capelle]

π(115) = (1*1*5)^1 + (1*1*5)^2. [Bervaye]

115 = (1+1+5) * prime(1+1+5) - π(1+1+5) is the only number with this property. [Firoozbakht]

The smallest composite number of the form 6p+1 where p is prime. [Silva]