211019985 has 112 divisors (see below), whose sum is σ = 437549760. Its totient is φ = 96577920.

The previous prime is 211019983. The next prime is 211019993. The reversal of 211019985 is 589910112.

211019985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211019985 - 2¹ = 211019983 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (211019983) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 761667 + ... + 761943.

Almost surely, 2^211019985 is an apocalyptic number.

It is an amenable number.

211019985 is an abundant number, since it is smaller than the sum of its proper divisors (226529775).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211019985 is a wasteful number, since it uses less digits than its factorization.

211019985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 211019985 is about 14526.5269421152. The cubic root of 211019985 is about 595.3529765398.

The spelling of 211019985 in words is "two hundred eleven million, nineteen thousand, nine hundred eighty-five".