Whatsapp on android device: PlayStore error code -11, parsing error when trying manual install
From my own experience the actual WhatsApp 2.16.382 version is not running anymore on devices with Android version lower than 4.0 (officially 2.1 and 2.2) since they launched the video call feature.

It seems like they have dropped the support for those devices as they did for Windows 7 - 7.5 phones, Symbian S40-S60 and Blackberry OS 7 and lower according to their blog.

You should try version 2.16.225 or 2.16.259 (find the apks) which worked for me.