Number reference
35 explained.
35: thirty-five, composite; factors, prime factorization, roots, binary, hexadecimal, and digit properties.
Identity and representations
- Written form
- thirty-five
- Classification
- composite
- Factors
- 1, 5, 7, 35
- Prime factorization
- 5 × 7
- Square root
- 5.91608
- Cube root
- 3.271066
- Binary
- 100011
- Octal
- 43
- Hexadecimal
- 23
- Roman numeral
- XXXV
- Digit sum
- 8
- Digital root
- 8
What makes 35 notable
- Semiprime. 35 = 5 × 7, a product of exactly two primes. That gives it just four divisors, so it splits into equal groups in only two non-trivial ways.
35 in everyday use
Thirty-five is the minimum age to become President of the United States, set in the Constitution. It is the atomic number of bromine, one of only two elements that is liquid at room temperature. Thirty-five millimetre film became the standard for both still photography and cinema, and 35 mm remains the reference for camera lenses. France introduced a statutory 35-hour working week in 2000. A 35th wedding anniversary is coral.
Thirty-five is the product of 5 and 7 and a tetrahedral number: 1 + 3 + 6 + 10 + 15, the balls in a five-layer triangular pyramid. It is also the number of ways to choose three items from seven, and the number of distinct hexominoes — shapes made of six connected squares. Its two digits, 3 and 5, are both prime, and so are its two factors. In binary it is 100011, and it sits one below the square 36.
Nearby numbers
How to read this page
The factor list shows every way 35 splits into equal whole-number groups — 4 divisors in total. The prime factorisation is the compact form of that same information, and the base conversions restate 35 for contexts that do not use decimal.
Percentage calculator · Fraction calculator · Browse Number Explorer