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

Full prime factorization: [[3]] * [[11]]

Factor pairs:

[[33]] = [[3]] * [[11]]

Proper divisors: [[3]], [[11]]

Primes up to 33: [[2]], [[3]], [[5]], [[7]], [[11]], [[13]], [[17]], [[19]], [[23]], [[29]], [[31]].

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

The closest centered hexagonal numbers are [[19]] (index # [[3]]) and [[37]] (index # [[4]]).

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/33]] is closest to [[C1]] at [[33]] Hz (+16 cents).

Note class: [[C]], Octave: [[octave/1]].

• [[square]]: 1089

• [[square root]]: 5.7446

• [[cube]]: 35937

• [[cube root]]: 3.2075

• [[natural log]] (ln): 3.4965

• [[base-10 log]] (log10): 1.5185

• [[base-2 log]] (log2): 5.0444