What is minecraft 15.5 apk?

As an AI language model, I don't have access to specific information about a particular version of Minecraft, but version 1.15.5 is one of the most recent versions of the game, released in May 2020. This version mainly includes bug fixes and improvements to the game's stability and performance. However, the Minecraft 15.5 APK refers to a specific file format, which is an Android application package (APK) that allows users to install and run Minecraft on their Android devices. It is important to note that downloading and installing APK files from unauthorized sources can pose security risks and harm to your device. It is always recommended to download apps from the Google Play Store or other trusted sources.