55209
55209 is a odd composite number that follows 55208 and precedes 55210. It is composed of 16 distinct factors: 1, 3, 7, 11, 21, 33, 77, 231, 239, 717, 1673, 2629, 5019, 7887, 18403, 55209. Its prime factorization can be written as 3 × 7 × 11 × 239. 55209 is classified as a deficient number based on the sum of its proper divisors. In computer science, 55209 is represented as 1101011110101001 in binary and D7A9 in hexadecimal.
Factor Analysis
16 FactorsProperties
The prime factorization (3 × 7 × 11 × 239) reveals 4 prime building blocks.
Divisible by 2
55209 ends in 9, so it is odd.
Divisible by 3
The digit sum 21 is a multiple of 3.
Divisible by 4
The last two digits 09 are not divisible by 4.
Divisible by 5
55209 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 21 is not a multiple of 9.
Divisible by 10
55209 does not end in 0.
Divisible by 11
The alternating digit sum 11 is a multiple of 11.
Deficient classification and digit analytics place 55209 within several notable number theory sequences:
Timeline
Deep dive
How 55209 breaks down
55209 carries 16 distinct factors and a digit signature of 21 (3 as the digital root). The deficient classification indicates that its proper divisors sum to 36951, which stays below the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 1101011110101001 supports bitwise reasoning, hexadecimal D7A9 aligns with computing notation, and the Roman numeral N/A (1-3999) keeps the encyclopedic tradition alive. These attributes make 55209 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 55209 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (55204–55214) to tune search ranges, and educators feature 55209 in worksheets about factor trees. Its binary footprint of length 16 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 55209 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 55209
Is 55209 a prime number?
55209 is composite with 16 total factors and the prime factorization 3 × 7 × 11 × 239.
What is the prime factorization of 55209?
It breaks down as 3 × 7 × 11 × 239, multiplying the primes 3 × 7 × 11 × 239.
How is 55209 represented in binary and hexadecimal?
55209 converts to 1101011110101001 in binary and D7A9 in hexadecimal, which are helpful for computer science applications.
Is 55209 a perfect square, cube, or triangular number?
55209 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 55209?
The digits sum to 21, producing a digital root of 3. These tests power divisibility shortcuts for 3 and 9.