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85 (number)

85 is the natural number following 84 and preceding 86.

List of numbers — Integers << 80 81 82 83 84 85 86 87 88 89 >>
Cardinal	eighty-five
Ordinal	86th (eighty-fifth)
Factorization	<math> 5 \cdot 17 <math>
Roman numeral	LXXXV
Binary	01010101
Hexadecimal	55

Eighty-five is an octahedral number, a centered triangular number, a centered square number, a decagonal number, and a Smith number.

It is also:

• the atomic number of astatine (At)
• the model number of SU-85
• the number of the French department Vendée
• the designation of Interstate 85, a freeway that runs from Alabama to Virginia; the European route E85 from Klaipéda to Alexandropoúli
• The year AD 85, 85 BC, or 1985.