The next number in the series is 17.
This series consists of prime numbers. A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. The prime numbers in the sequence are:
- 2
- 3
- 5
- 7
- 11
- 13
The next prime number after 13 is 17, which is not divisible by any whole number other than 1 and itself, confirming it as the next number in this series.