3 ms·

223. EDIT: 219 is definitely smaller than 223.

• burgerbrain 15y ago
  219 Edit: on the other hand, in the math category "219 is the smallest number that can be represented as a sum of four positive cubes in two different ways."
• michaelochurch 15y ago
  223 is a US date-prime. 2 and 23 is prime, and so is 223. That may be a stretch, but it qualifies as something interesting.