The GDP of Russia isn’t the PPP GDP of Russia. Internally Russian service and extraction sectors are cheap, which means intenrational PPP adjusted it is high. The GDP and non exports are much lower than Germanies and the indicator GDP PPP isn’t that great to compare to the EWR.
Per person not too much changed, but the PPP GDP changed. However if it enables increase of productive facilities is an open question. If the service wage of a country decrease then that country will gain a short term boost in PPP GDP (till low income spending of service workers turn up in the statistics).
Always good to have a look at stuff like Gini coefficients (which are a bad indicator, but not useless): https://de.wikipedia.org/wiki/Liste_der_Länder_nach_Einkommensverteilung
How much the acknowledged income of the top 10% is higher than the lowest 10% (so 6,7 means the top 10% have nearly 7 times the income - not wealth! - of the lower 10% of incomes in terms of households of the country. Top income households are typically smaller - in terms of persons per household, not in terms of square meter per household -, so if you look at it from a per person view it will be even worse from our perspective)