211990870 has 96 divisors (see below), whose sum is σ = 488150208. Its totient is φ = 64544256.

The previous prime is 211990853. The next prime is 211990873. The reversal of 211990870 is 78099112.

211990870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211990873) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 765172 + ... + 765448.

It is an arithmetic number, because the mean of its divisors is an integer number (5084898).

Almost surely, 2^211990870 is an apocalyptic number.

211990870 is an abundant number, since it is smaller than the sum of its proper divisors (276159338).

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

211990870 is a wasteful number, since it uses less digits than its factorization.

211990870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 211990870 is about 14559.9062496982. The cubic root of 211990870 is about 596.2646359435.

The spelling of 211990870 in words is "two hundred eleven million, nine hundred ninety thousand, eight hundred seventy".