211312 has 20 divisors (see below), whose sum is σ = 419616. Its totient is φ = 103040.

The previous prime is 211297. The next prime is 211313. The reversal of 211312 is 213112.

211312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211312² = 89305522688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211313) by changing a digit.

211312 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, 612 + ... + 892.

2²¹¹³¹² is an apocalyptic number.

It is an amenable number.

211312 is a deficient number, since it is larger than the sum of its proper divisors (208304).

211312 is a wasteful number, since it uses less digits than its factorization.

211312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 330 counting only the distinct ones).

The product of its digits is 12, while the sum is 10.

The square root of 211312 is about 459.6868499316. The cubic root of 211312 is about 59.5627471658.

Adding to 211312 its reverse (213112), we get a palindrome (424424).

The spelling of 211312 in words is "two hundred eleven thousand, three hundred twelve", and thus it is an iban number.