228

228 = 2² x 3 x 19.

228 is 444 in base 7.

228 can be represented as 2⁸ - 28.

228 + 1, 228 - 1, 822 + 1, 822 - 1, (228 + 882) + 1, and (228 + 882) - 1 are all primes.

228 is the sum of six consecutive primes (29 + 31 + 37 + 41 + 43 + 47) and the sum of ten consecutive primes (7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37 + 41).

The 228 incident was an anti-government uprising in Taiwan. The number refers to the day the massacre began: February 28, 1947.

Source: Prime Curios!