*would post the mayan numbers for 147but only ever saw mayan numbers at a museum and forgot how they work exactly."
One hundred fifty one bottles of beer on the wall, one hundred fifty one bottles of beer.... wait we're counting up, not down...
If you add up all the primes between the least and greatest prime factors of 155, that is, 5 and 31, the result is 155.
157 is a prime number. The next prime is 163 and the previous prime is 151, with which 157 form a sexy prime triplet. Taking the arithmetic mean of those primes yields 157, thus it is a balanced prime.