Whether proper numerology or not, I think that Typology systems have a numerological element, for example MBTI/Jung is based around the number 2/4/8/16, and enneagram is based on 3/9 and also names its types by numbers, the 9 enneagram types resembling what I have read of the personalities in numerology. I think that the numbers that they are based on give the systems certain characteristics, such as the several axes of symmetry in the MBTI.