Web82 is: the twenty-seventh semiprime and the thirteenth of the form (2.q). with an aliquot sum of 44, within an aliquot sequence of four composite numbers (82,44,40,50,43,1,0) to the Prime in the 43-aliquot tree. a companion Pell number. a happy number. palindromic in bases 3 (10001 3), 9 (101 9) and 40 (22 40). In science. The atomic ...