15000000001

15000000001 is a natural number. In decimal notation it is 15,000,000,001, which can be written as 15 × 10^9 + 1. It sits between 15,000,000,000 and 15,000,000,002 on the integer number line and has no special meaning beyond being a large composite integer.

Mathematical properties

The number is composite. A straightforward factorization shows 15000000001 = 7 × 2142857143, and 2142857143 = 7 × 306122449. Therefore, 15000000001 factors as 7^2 × 306122449, i.e., 15000000001 = 49 × 306122449. The cofactor 306122449 is odd and not divisible by 2, 3, 5, or 7, and its complete factorization is not commonly cited in standard references.

Numerical context

As a 11-digit integer, 15000000001 is notable mainly as an example of a large composite number with a small prime factor. Its prime factorization demonstrates that even seemingly simple decimal patterns can hide nontrivial divisors. The number does not have widely recognized special properties in number theory beyond its basic factorization.

See also

List of composite numbers, prime factorization, divisibility.