The producers of “700 Sundays” have announced a May 22 closing after 21 previews and 149 regular performances. Despite the show’s title, Billy Crystal will have played only two Sunday performances: opening day, Dec. 21, and closing day. Thanks to premium tickets priced up to $251.25, “700 Sundays” has grossed like one of Broadway’s most popular musicals, earning well into the $700,000s week after week. With a cumulative gross of over $21 million, “700 Sundays” broke the B.O. house record at the Broadhurst Theater and set a record for the highest weekly gross for a nonmusical in Broadway history.