[[2016]] is not prime (composite). Want proof? :)

Full prime factorization: [[2]] * [[2]] * [[2]] * [[2]] * [[2]] * [[3]] * [[3]] * [[7]]

Factor pairs:

[[2016]] = [[2]] * [[1008]]

[[2016]] = [[3]] * [[672]]

[[2016]] = [[4]] * [[504]]

[[2016]] = [[6]] * [[336]]

[[2016]] = [[7]] * [[288]]

[[2016]] = [[8]] * [[252]]

[[2016]] = [[9]] * [[224]]

[[2016]] = [[12]] * [[168]]

[[2016]] = [[14]] * [[144]]

[[2016]] = [[16]] * [[126]]

[[2016]] = [[18]] * [[112]]

[[2016]] = [[21]] * [[96]]

[[2016]] = [[24]] * [[84]]

[[2016]] = [[28]] * [[72]]

[[2016]] = [[32]] * [[63]]

[[2016]] = [[36]] * [[56]]

[[2016]] = [[42]] * [[48]]

Proper divisors: [[2]], [[3]], [[4]], [[6]], [[7]], [[8]], [[9]], [[12]], [[14]], [[16]], [[18]], [[21]], [[24]], [[28]], [[32]], [[36]], [[42]], [[48]], [[56]], [[63]], [[72]], [[84]], [[96]], [[112]], [[126]], [[144]], [[168]], [[224]], [[252]], [[288]], [[336]], [[504]], [[672]], [[1008]]

Primes up to 2016: [[2]], [[3]], [[5]], [[7]], [[11]], [[13]], [[17]], [[19]], [[23]], [[29]], [[31]], [[37]], [[41]], [[43]], [[47]], [[53]], [[59]], [[61]], [[67]], [[71]], [[73]], [[79]], [[83]], [[89]], [[97]], [[101]], [[103]], [[107]], [[109]], [[113]], [[127]], [[131]], [[137]], [[139]], [[149]], [[151]], [[157]], [[163]], [[167]], [[173]], [[179]], [[181]], [[191]], [[193]], [[197]], [[199]], [[211]], [[223]], [[227]], [[229]], … (305 total).

[[2016]] is not a centered hexagonal number.

The closest centered hexagonal numbers are [[1951]] (index #[[26]]) and [[2107]] (index #[[27]]).

First 20 centered hexagonal numbers: [[1]], [[7]], [[19]], [[37]], [[61]], [[91]], [[127]], [[169]], [[217]], [[271]], [[331]], [[397]], [[469]], [[547]], [[631]], [[721]], [[817]], [[919]], [[1027]], [[1141]].

• [[square]]: 4064256

• [[square root]]: 44.8999

• [[cube]]: 8193540096

• [[cube root]]: 12.6327

• [[natural log]] (ln): 7.6089

• [[base-10 log]] (log10): 3.3045

• [[base-2 log]] (log2): 10.9773