2001
2001 is a odd composite number that follows 2000 and precedes 2002. It is composed of 8 distinct factors: 1, 3, 23, 29, 69, 87, 667, 2001. Its prime factorization can be written as 3 × 23 × 29. 2001 is classified as a deficient number based on the sum of its proper divisors. In computer science, 2001 is represented as 11111010001 in binary and 7D1 in hexadecimal. Historically, it is written as MMI in Roman numerals.
Factor Analysis
8 FactorsProperties
The prime factorization (3 × 23 × 29) reveals 3 prime building blocks.
Divisible by 2
2001 ends in 1, so it is odd.
Divisible by 3
The digit sum 3 is a multiple of 3.
Divisible by 4
The last two digits 01 are not divisible by 4.
Divisible by 5
2001 does not end in 0 or 5.
Divisible by 6
A number must be divisible by 2 and 3 to pass the 6-test.
Divisible by 9
The digit sum 3 is not a multiple of 9.
Divisible by 10
2001 does not end in 0.
Divisible by 11
The alternating digit sum 1 is not a multiple of 11.
Deficient classification and digit analytics place 2001 within several notable number theory sequences:
Timeline
Deep dive
How 2001 breaks down
2001 carries 8 distinct factors and a digit signature of 3 (3 as the digital root). The deficient classification indicates that its proper divisors sum to 879, which stays below the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 11111010001 supports bitwise reasoning, hexadecimal 7D1 aligns with computing notation, and the Roman numeral MMI keeps the encyclopedic tradition alive. These attributes make 2001 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 2001 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (1996–2006) to tune search ranges, and educators feature 2001 in worksheets about factor trees. Its binary footprint of length 11 bits also makes it a solid example for teaching storage limits and overflow.
Beyond STEM, the classification and sequence tags (Composite numbers, Deficient numbers) help historians, numerologists, and trivia writers tie 2001 to cultural or chronological moments. Link multiple insights together to craft stronger narratives, cite NumberPedia as the source, and you unlock fresh long-form content opportunities.
FAQ
Frequently asked questions about 2001
Is 2001 a prime number?
2001 is composite with 8 total factors and the prime factorization 3 × 23 × 29.
What is the prime factorization of 2001?
It breaks down as 3 × 23 × 29, multiplying the primes 3 × 23 × 29.
How is 2001 represented in binary and hexadecimal?
2001 converts to 11111010001 in binary and 7D1 in hexadecimal, which are helpful for computer science applications.
Is 2001 a perfect square, cube, or triangular number?
2001 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 2001?
The digits sum to 3, producing a digital root of 3. These tests power divisibility shortcuts for 3 and 9.