[IonImplantGuru]

"210 might have some obscure property"
210 factors into 2*3*5*7, the first 4 primes.... FWIW.

Kewl! I figured something like that. Also note that those factors, when added, sum up to another prime!

2 + 3 + 5 + 7 = 17

[NukeMan]

And, as long as we're at it, 210 is the *sum* of two primes (Goldbach's conjecture).