211304 has 16 divisors (see below), whose sum is σ = 403620. Its totient is φ = 103680.

The previous prime is 211297. The next prime is 211313. The reversal of 211304 is 403112.

It is a happy number.

211304 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 158404 + 52900 = 398^2 + 230^2 .

It is an unprimeable number.

211304 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272 + ... + 704.

2²¹¹³⁰⁴ is an apocalyptic number.

It is an amenable number.

211304 is a deficient number, since it is larger than the sum of its proper divisors (192316).

211304 is a wasteful number, since it uses less digits than its factorization.

211304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 211304 is about 459.6781482733. The cubic root of 211304 is about 59.5619955001.

Adding to 211304 its reverse (403112), we get a palindrome (614416).

It can be divided in two parts, 211 and 304, that added together give a palindrome (515).

The spelling of 211304 in words is "two hundred eleven thousand, three hundred four", and thus it is an iban number.