81 ‖ number eighty one

integer, natural,
positive, counting number, odd

composite

81 ― 58^th composite number,
divisible by 1, 3, 9, 27 & 81
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square

9² ‖ (3²)²

bisquare

3⁴

0. bin code

   0011100000110001

1. url code

   %38%31

2. html codes

   • 81
   • 81

3. css codes

   • \0038\0031
   • \38\31

4. js codes

   • \u0038\u0031
   • \u{38}\u{31}
   • \x38\x31

relates

• n.31
• n.38
• n.49
• n.56