211000985 has 16 divisors (see below), whose sum is σ = 287031360. Its totient is φ = 147614400.

The previous prime is 211000981. The next prime is 211001009. The reversal of 211000985 is 589000112.

It is a happy number.

It is not a de Polignac number, because 211000985 - 2² = 211000981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211000981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84191 + ... + 86660.

It is an arithmetic number, because the mean of its divisors is an integer number (17939460).

Almost surely, 2^211000985 is an apocalyptic number.

It is an amenable number.

211000985 is a deficient number, since it is larger than the sum of its proper divisors (76030375).

211000985 is a wasteful number, since it uses less digits than its factorization.

211000985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170888.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 211000985 is about 14525.8729513926. The cubic root of 211000985 is about 595.3351077014.

The spelling of 211000985 in words is "two hundred eleven million, nine hundred eighty-five", and thus it is an aban number.