358

This number is a composite.

358 is the smallest number whose first two digits are distinct odd-primes such that their sum equals the third digit. [Sladcik]

The sum of th-digit splits is equal to the product of the digits: (3 + 58) + (35 + 8) + (3 + 5 + 8 ) = 3 * 5 * 8. [Sladcik]