Michael Lohan Pays Massive Delinquent Child Support Bill

Michael Lohan is no longer a deadbeat dad -- not that he's an upstanding one mind you, but at least he's current on his child support.

We got proof he just paid ex-wife Dina Lohan $30,422 in back child support.

And here's how he got there. Michael was ordered to pay $1,500 per month for his minor children ... but he didn't, so the bill ballooned over the years.

FYI, only one of the Lohan kids -- 16-year-old Cody -- is still underage. It's likely the back child support also covers the time when Lindsay's lil' sister Ali was a minor (she's 19 now).

Michael paid just in the nick of time ... Dina went to court last month, asking a judge to hold Michael in contempt ... but Michael apparently beat the judge to the punch by cutting the check.

Michael tells TMZ, "I admit I withheld part of [Cody's] child support because I was angry about certain things that were happening ... I was wrong and I'm making things right with Dina and my children."