A lot of the maths and science articles had been written by college professors and the like. How else do you think they would know so many things about 322_(number)? just check the article yourself, and you will see:
It is a triangular number and the sum of a pair of twin primes (149 + 151), as well as the sum of ten consecutive primes (13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47). It is a Harshad number.