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

Full prime factorization: [[2]] * [[5]] * [[11]]

Factor pairs:

[[110]] = [[2]] * [[55]]

[[110]] = [[5]] * [[22]]

[[110]] = [[10]] * [[11]]

Proper divisors: [[2]], [[5]], [[10]], [[11]], [[22]], [[55]]

Primes up to 110: [[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]].

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

The closest centered hexagonal numbers are [[91]] (index # [[6]]) and [[127]] (index # [[7]]).

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]].

[[hz/110]] is closest to [[A2]] at [[110]] Hz (perfect pitch).

Note class: [[A]], Octave: [[octave/2]].

• [[square]]: 12100

• [[square root]]: 10.4881

• [[cube]]: 1331000

• [[cube root]]: 4.7914

• [[natural log]] (ln): 4.7005

• [[base-10 log]] (log10): 2.0414

• [[base-2 log]] (log2): 6.7814