About the number 253

Aside from the sum of 2, 5 and 3 equaling 10 (a very round number), 253 has some more cool features:
    ⇒253 converted to binary is 11,111,101. In decimal, 11,111,101 is a prime number.
    ⇒2 - 5 + 3 = 0
    ⇒2, 5 and 3 are the first 3 prime numbers