Getting the user name for a given security identifier (SID)

Two lines of Powershell code:

PS C:\> $osid=New-Object system.security.principal.securityidentifier("S-1-5-21-593069383-354653268-975305329-98179")

PS C:\> Write-Host $osid.translate([system.security.principal.ntaccount])

Output is in the form of <DOMAIN>\<USERID>

ie. NODDYLAND\admin-bike01

Reference:
Microsoft: Well-known security identifiers in Windows operating systems