Field name conversion into understandble format

Hi team,

I was trying to collect the data from the view M_BACKUP_CATALOG.

20150315081801546000000 : SYS_START_TIME.

When i check the functions  i dont see a function to convert this field into date and time.

https://help.sap.com/saphelp_hanaone/helpdata/en/20/f1662775191014a6f7cead37a5937a/content.htm?frameset=/en/20/f057b075191014809a8f010c03d7c2/frameset.htm&current_toc=/en/2e/1ef8b4f4554739959886e55d4c127b/plain.htm&node_id=38