Very nice palindromic binary year for everybody!
IntegerDigits[2015, 2]
{1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1}
It is also a Lucas-Carmichel number.
n = 2015; factors = FactorInteger[n][[All, 1]]; AllTrue[factors + 1, Divisible[n + 1, #] &]
True
See this link: Lucas–Carmichael number
-adk-
It's (trivially) a palindrome in any base >= 2016..
I noticed another interesting coincidence (?) about "2015":
which are:
Well, these have actually been in alignment since the year 2010, when both computations yielded 2673, but did anyone notice before?
