431
431 is a odd prime number that follows 430 and precedes 432. As a prime number, 431 is only divisible by 1 and itself. It holds a unique position in the sequence of integers. Its prime factorization is simply 431. 431 is classified as a deficient number based on the sum of its proper divisors. In computer science, 431 is represented as 110101111 in binary and 1AF in hexadecimal. Historically, it is written as CDXXXI in Roman numerals.
Factor Analysis
2 FactorsProperties
431 is prime, so its only factors are 1 and 431.
Divisible by 2
431 ends in 1, so it is odd.
Divisible by 3
The digit sum 8 is not a multiple of 3.
Divisible by 4
The last two digits 31 are not divisible by 4.
Divisible by 5
431 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 8 is not a multiple of 9.
Divisible by 10
431 does not end in 0.
Divisible by 11
The alternating digit sum 2 is not a multiple of 11.
Deficient classification and digit analytics place 431 within several notable number theory sequences:
Timeline
Deep dive
How 431 breaks down
431 carries 2 distinct factors and a digit signature of 8 (8 as the digital root). The deficient classification indicates that its proper divisors sum to 1, which stays below the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 110101111 supports bitwise reasoning, hexadecimal 1AF aligns with computing notation, and the Roman numeral CDXXXI keeps the encyclopedic tradition alive. These attributes make 431 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 431 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (426–436) to tune search ranges, and educators feature 431 in worksheets about prime identification. Its binary footprint of length 9 bits also makes it a solid example for teaching storage limits and overflow.
Beyond STEM, the classification and sequence tags (Prime numbers, Deficient numbers) help historians, numerologists, and trivia writers tie 431 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 431
Is 431 a prime number?
431 is prime, meaning it is only divisible by 1 and itself.
What is the prime factorization of 431?
431 is already prime, so the factorization is simply 431.
How is 431 represented in binary and hexadecimal?
431 converts to 110101111 in binary and 1AF in hexadecimal, which are helpful for computer science applications.
Is 431 a perfect square, cube, or triangular number?
431 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 431?
The digits sum to 8, producing a digital root of 8. These tests power divisibility shortcuts for 3 and 9.