514

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Number

$514$ (five hundred and fourteen) is:

$2 \times 257$

The $9$th even integer after $2$, $4$, $94$, $96$, $98$, $400$, $402$, $404$ that cannot be expressed as the sum of $2$ prime numbers which are each one of a pair of twin primes

The $15$th positive integer after $200$, $202$, $204$, $205$, $206$, $208$, $320$, $322$, $324$, $325$, $326$, $328$, $510$, $512$ that cannot be made into a prime number by changing just $1$ digit

Also see

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