Moscow (CNN)Russian President Vladimir Putin congratulated Joe Biden on his victory in the US presidential election Tuesday, six weeks after the vote and a day after the Electoral College officially affirmed Biden's win.

While many world leaders congratulated President-elect Biden within days of the election, the Kremlin said at the time that it deemed it "correct" to wait for the official results before Putin congratulated the winner.

"Vladimir Putin wished the President-elect every success and expressed confidence that Russia and the United States, which bear special responsibility for global security and stability, despite their differences can truly contribute to solving many problems and challenges that the world is currently facing," a Kremlin readout said on Tuesday.

Putin noted that "Russian-American cooperation based on the principles of equality and mutual respect would meet the interests of people in both countries as well as the entire international community."

"For my part, I am ready for cooperation and contacts with you," the Russian President said.