億 means hundred million and is a JLPT N2 kanji. It has 15 strokes and uses the person (side) radical (亻).
Stroke order · 15 strokes
On'yomi (音読み)
オク
Kun'yomi (訓読み)
—
Radical
亻 · person (side)
Strokes
15
How to remember 億
A number beyond even a person's (亻) imagination (意) — one hundred million. 一億 — Japan's population is about 一億二千万 (120 million); the unit of a big-money dream.