211704 has 16 divisors (see below), whose sum is σ = 529320. Its totient is φ = 70560.

The previous prime is 211693. The next prime is 211711. The reversal of 211704 is 407112.

211704 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4387 + ... + 4434.

2²¹¹⁷⁰⁴ is an apocalyptic number.

211704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

211704 is an abundant number, since it is smaller than the sum of its proper divisors (317616).

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

211704 is a wasteful number, since it uses less digits than its factorization.

211704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8830 (or 8826 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 211704 is about 460.1130295916. The cubic root of 211704 is about 59.5995555723.

Adding to 211704 its reverse (407112), we get a palindrome (618816).

The spelling of 211704 in words is "two hundred eleven thousand, seven hundred four", and thus it is an iban number.