Aisatou is from the Wolof / Pulaar / Mandinka Aïssatou — West African rendition of Arabic Aisha / 'Aaʾisha (عَائِشَة — living, alive). Aisatou is one of the Senegalese + Malian + Gambian + Guinean feminine names — central to traditional West African Muslim heritage.
Aisatou does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Aisatou reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.