55 (number) - Wikipedia
https://en.m.wikipedia.org:443/wiki/55_(number)
WEBMathematics. 55 is the fifteenth discrete semiprime, [1] and the second with 5 as the lowest non-unitary factor. Thus, of the form 5 × q with q a higher prime, in this case equal to 11. It contains an aliquot sum of 17; the seventh prime number, within an aliquot sequence of one composite number (55, 17, 1, 0) that is rooted in the 17 -aliquot ...
DA: 86 PA: 67 MOZ Rank: 62