2:19•34•56

It appears that you are presenting a time format, possibly hours, minutes, and seconds. If that's the case, 2:19:34:56 could be interpreted as:

• 2 hours
• 19 minutes
• 34 seconds
• 56 milliseconds (if counting milliseconds the last two digits might refer to)

If you need information or calculations involving this time duration, could you please clarify what you would like to do with it?