The square root of 8212890625 is 90625.
It is an automorphic number since its square, 67451572418212890625, ends in 8212890625.
It is a trimorphic number since its cube, 553972386755049228668212890625, ends in 8212890625.
It is a de Polignac number, because none of the positive numbers 2k-8212890625 is a prime.
It is a Duffinian number.
It is an unprimeable number.
Almost surely, 28212890625 is an apocalyptic number.
8212890625 is the 90625-th square number.
8212890625 is the 45313-rd centered octagonal number.
It is an amenable number.
8212890625 is an frugal number, since it uses more digits than its factorization.
8212890625 is an odious number, because the sum of its binary digits is odd.
The cubic root of 8212890625 is about 2017.5858019849.
The spelling of 8212890625 in words is "eight billion, two hundred twelve million, eight hundred ninety thousand, six hundred twenty-five".