211328685 has 48 divisors (see below), whose sum is σ = 377005824. Its totient is φ = 109454976.

The previous prime is 211328657. The next prime is 211328693. The reversal of 211328685 is 586823112.

It is a happy number.

It is not a de Polignac number, because 211328685 - 2¹¹ = 211326637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 344439 + ... + 345051.

It is an arithmetic number, because the mean of its divisors is an integer number (7854288).

Almost surely, 2^211328685 is an apocalyptic number.

It is an amenable number.

211328685 is a deficient number, since it is larger than the sum of its proper divisors (165677139).

211328685 is a wasteful number, since it uses less digits than its factorization.

211328685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834 (or 831 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 211328685 is about 14537.1484480279. The cubic root of 211328685 is about 595.6431479771.

The spelling of 211328685 in words is "two hundred eleven million, three hundred twenty-eight thousand, six hundred eighty-five".