211890163 has 2 divisors, whose sum is σ = 211890164. Its totient is φ = 211890162.

The previous prime is 211890143. The next prime is 211890169. The reversal of 211890163 is 361098112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211890163 - 2²¹ = 209793011 is a prime.

It is not a weakly prime, because it can be changed into another prime (211890169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105945081 + 105945082.

It is an arithmetic number, because the mean of its divisors is an integer number (105945082).

Almost surely, 2^211890163 is an apocalyptic number.

211890163 is a deficient number, since it is larger than the sum of its proper divisors (1).

211890163 is an equidigital number, since it uses as much as digits as its factorization.

211890163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 211890163 is about 14556.4474718250. The cubic root of 211890163 is about 596.1702017919.

The spelling of 211890163 in words is "two hundred eleven million, eight hundred ninety thousand, one hundred sixty-three".