2351

2351 is a prime number. It is a Sophie Germain prime because 2 x 2351 + 1 = 4703 is also prime.

2351²³⁵¹ ends in the digits 2351.

There are 6907 digits in 2351! Note that 6907 is prime.

2351 is in the middle of a sequence of 17 consecutive primes whose sum is also prime: 2293 + 2297 + . . . + 2351 + 2393 + 2399 = 39971 is prime and 17 is prime.

2351 is the sum of all three-digit Fibonacci numbers.

Source: Prime Curios!