211689207 has 14 divisors (see below), whose sum is σ = 317389712. Its totient is φ = 141125652.

The previous prime is 211689197. The next prime is 211689221. The reversal of 211689207 is 702986112.

It is not a de Polignac number, because 211689207 - 2¹⁵ = 211656439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211689007) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 144463 + ... + 145920.

Almost surely, 2^211689207 is an apocalyptic number.

211689207 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

211689207 is a deficient number, since it is larger than the sum of its proper divisors (105700505).

211689207 is an frugal number, since it uses more digits than its factorization.

211689207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290401 (or 290386 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 211689207 is about 14549.5431887053. The cubic root of 211689207 is about 595.9816734977.

The spelling of 211689207 in words is "two hundred eleven million, six hundred eighty-nine thousand, two hundred seven".