Number Gossip

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Unique Properties of 253

  • 253 is the smallest non-trivial triangular star number
  • 253 is the smallest number n such that n2 can be split into two nonzero squares (perhaps with leading zeros) in two different ways (2532 = 64009, and can be split as 64 and 009 or as 6400 and 9)

Common Properties of 253

Composite
Deficient
Odd
Odious
Square-free
Triangular
Ulam