There are four verses in Quran which we must prostrate when we recite or listen to any of them. They are: 1. The last verse in Sura al-'Alaq . 2. The last verse in Sura Najm. 3. A verse in Sura al-Sajda and 4. A verse in Sura Fussilat.
Immediate prostration is must and we don't need to have Wudhu, no facing Qibla in such prostration. Recitation during this prostration is recommended. It can be Subhanallah سبحان الله or Subhana Rabbi al-A'la Wa Bihamdih سبحان ربي الأعلى وبحمده m or any Du'a or Thikr of Allah even saying Ya Allah.
Wassalam.