Number Gossip

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Unique Properties of 43

  • 43 is the smallest prime formed from reverse concatenation of two consecutive numbers
  • 43 is the smallest prime whose index (14) is divisible by the sum of its digits (4+3)
  • 43 is the smallest prime that is not the sum of two palindromes
  • 43 is the smallest non-palindromic prime which on subtracting its reverse gives a perfect square (i.e., 43 - 34 = 32)
  • 43 is the minimal sum on each face of Honaker's Magic Die - a die with dots numbered with distinct integers to sum up to the same sum on each face
  • A web page about 43: interstate forty-three, a personal blog dedicated to bizarre facts about the number 43

Common Properties of 43