1651 = 13 x 127.
1651 is 11001110011 in base 2 (binary) (A048700).
1651 is a heptagonal number (A000566).
1651 is a potential magic constant of a 7 x 7 magic squares composed of consecutive primes (A188536).
1651 is the sum of eight but not fewer squared primes (A183215).
Source: On-Line Encyclopedia of Integer Sequences
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