Are the open ports 53,139,445 and 49152 expected on a Linux machine? [closed]

I ran an nmap stealth scan on my home network (using linux) and this is my result. I don’t know why netbios is open – I ran the samba command and it is not recognised, so I don’t think I have Samba on my machine. If someone could clarify that would be great. I am running Ubuntu Linux. I’ve also noticed a lot of TCP ESTABLISHED connections I don’t recognise. Is this something to investigate further?

Not shown: 993 closed ports PORT      STATE    SERVICE 22/tcp    filtered ssh 53/tcp    open     domain 80/tcp    open     http 139/tcp   open     netbios-ssn 443/tcp   open     https 445/tcp   open     microsoft-ds 49152/tcp open     unknown