35 (thirty-five) is the natural number following 34 and preceding 36.

Cardinal	thirty-five
Ordinal	35th (thirty-fifth)
Factorization
Roman numeral	XXXV
Binary	100011
Hexadecimal	23

In mathematics

It is the sum of the first five triangular numbers, making it a tetrahedral number. It is also a centered cube number. 35 is a pentagonal number and a pentatope number.

There are 35 hexominos, the polyominos made from 6 squares.

35 is a highly cototient number, since there are more solutions to the equation x - φ(x) = 35 than there are for any other integers below it except 1.

35 is the highest number one can count to on one's fingers using base 6.

In science

• The atomic number of bromine

In astronomy,

Messier object M35, a magnitude 5.5 open cluster in the constellation Gemini

The New General Catalogue object NGC 35 , a galaxy in the constellation Cetus

The Saros number of the solar eclipse series which began on -1870 July 25 and ended on -373 January 9. The duration of Saros series 35 was 1496.5 years, and it contained 84 solar eclipses.

The Saros number of the lunar eclipse series which began on -1550 May 14 and ended on -252 July 1. The duration of Saros series 35 was 1298.1 years, and it contained 73 lunar eclipses.

In other fields

35 is also:

• In years of marriage, the coral wedding anniversary.
• The designation of Interstate 35, a freeway that runs from Texas to Minnesota.
• Historical years: 35 A.D., 35 B.C., or 1935
• The minimum age (in years) of candidates for election to the position of President of the United States or President of Ireland.