Eighty-two

The eighty-two (82) is the natural number that follows eighty-one and precedes eighty-three.

Mathematical properties

• 82 is a composite number, which has the following factors: 1, 2 and 41. As the sum of its factors is 44 ≤ 82, it is a defective number.
• A semi-press number.
• A happy number.
• A number of accompanying Pell.
• Størmer number.

Science

• 82 is the atomic number of lead (Pb).
• 6th magic number in physics.
• Object of Messier M82 is an elongated and narrow irregular galaxy in the constellation of the Greater Wave.
• Mark 82 (Mk 82) is a high aerodynamic, unguided pump.