[[57]] is not prime (composite): [[3]] * [[19]]

Prime neighborhood: [[43]], [[47]], [[53]], [[57]], [[59]], [[61]], [[67]]

Prime gap: 6 (interval [[53]] to [[59]])

Primes up to 57: [[2]], [[3]], [[5]], [[7]], [[11]], [[13]], [[17]], [[19]], [[23]], [[29]], [[31]], [[37]], [[41]], [[43]], [[47]], [[53]] (16 total).

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

The closest centered hexagonal numbers are [[37]] (index # [[4]]) and [[61]] (index # [[5]]).

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/57]] is closest to [[A#1]] at [[57]] Hz (-38 cents).

Note class: [[A#]], Octave: [[octave/1]].

• [[square]]: 3249

• [[square root]]: 7.5498

• [[cube]]: 185193

• [[cube root]]: 3.8485

• [[natural log]] (ln): 4.0431

• [[base-10 log]] (log10): 1.7559

• [[base-2 log]] (log2): 5.8329