22001

22001 is a natural number that follows 22000 and precedes 22002. In mathematics, it is a composite number with prime factorization 7^2 × 449. Its positive divisors are 1, 7, 49, 449, 3143, and 22001, giving a total of six divisors. The number is odd and not divisible by 3 or 5, and it is divisible by 7 since 22001 = 7 × 3143. In other bases, 22001 is represented as 101010111110001 in binary and 0x55F1 in hexadecimal. The sum of its decimal digits is 5, and its digital root is 5.

As an integer, 22001 may appear in various contexts as an identifier or code, such as in catalog numbers, inventory items, or postal coding schemes in some systems. The specific interpretation depends on the setting, but the underlying arithmetic properties of the number remain the same across contexts.

Historically, there are no widely noted events uniquely associated with the integer 22001. Its interest in number theory stems from its factorization into a square times a prime and from its representations in different numeral systems, which illustrate common patterns in the study of integers and their bases.