43 (number)

List of numbers — Integers << 40 41 42 43 44 45 46 47 48 49 >>
Cardinal	forty-three
Ordinal	43rd (forty-third)
Factorization	prime
Roman numeral	XLIII
Binary	101011
Hexadecimal	2B

In mathematics

Forty-three is the 14th smallest prime number. The previous is forty-one, with which it comprises a twin prime, the next is forty-seven. (-43) is a Heegner number.

In other fields

Forty-three is also:

• The atomic number of technetium.
• The designation of Interstate 43, a freeway in Wisconsin.
• The code for direct dial international phone calls to Austria.
• Part of the title of the historical British comedy show Hancock's Forty-Three Minutes, starring Tony Hancock.
• Part of the title of a historical short story by Hershel Finman titled Forty-Three Rubles, about Rabbi Zvi Elimelech Spira.
• The year AD 43, 43 BC, and 1943.