The latest official stable version of the Google Play Store compatible with devices running is version 39.7.37-21 . While newer versions of the Play Store exist (such as version 50.9.23), they generally require at least Android 7.0 (Nougat) to function correctly . Latest Compatible Versions for Android 5.1.1 Latest Version for Android 5.1.1 Minimum Requirements Google Play Store 39.7.37-21 Android 5.0+ Google Play Services 24.07.54 Android 5.0+ How to Download and Install
Here’s a draft of an interesting feature concept for downloading the latest Google Play Store APK (version 51.1.x) on Android 5.1 (Lollipop): Android 5
: It is recommended to restart your device to ensure system services integrate correctly. Troubleshooting Tips Security risks : Downloading APKs from third-party sources