This is a Makki Surah and it is fifth in the number of Surahs that begin with HaMim.  It has 59 verses in 3 sections.

The Surah warns about the punishment of Allah. When the punishment will come then no one can avert it.  The division between the righteous and wicked in the Hereafter will be the final decision of Allah.

Recitation: Shaykh Mishaari Raashid & Ibrahaim Walk using Saheeh International Translation. Thematic introduction: Dr. Muzammil H. Siddiqi.