155
This number is a composite.
22 + 3! + 5! + 72 - 11 - 13 = 155. [Russ]
155 is the only three-digit number such that 155^155-155+1 is prime. [Opao]
The sum of primes between smallest and largest prime factor of
itself. [Post]
155 = prime(1+5+5) * π(1+5+5). It is the smallest number of this form. [Bajpai]
155 and 156 are the smallest pair of consecutive integers
whose highest prime factors (31 and 13) are anagrams of
each other. [Gaydos]
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