It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-213887 is a prime.
It is a Chen prime.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213887.
2213887 is an apocalyptic number.
213887 is an equidigital number, since it uses as much as digits as its factorization.
213887 is an evil number, because the sum of its binary digits is even.
The square root of 213887 is about 462.4791887210. The cubic root of 213887 is about 59.8037103920.
The spelling of 213887 in words is "two hundred thirteen thousand, eight hundred eighty-seven".