212031312 has 80 divisors (see below), whose sum is σ = 565892352. Its totient is φ = 68359680.

The previous prime is 212031311. The next prime is 212031343. The reversal of 212031312 is 213130212.

It is a junction number, because it is equal to n+sod(n) for n = 212031291 and 212031300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212031311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491737 + ... + 492167.

Almost surely, 2^212031312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212031312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282946176).

212031312 is an abundant number, since it is smaller than the sum of its proper divisors (353861040).

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

212031312 is a wasteful number, since it uses less digits than its factorization.

212031312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 212031312 is about 14561.2949973551. The cubic root of 212031312 is about 596.3025504712.

Adding to 212031312 its reverse (213130212), we get a palindrome (425161524).

The spelling of 212031312 in words is "two hundred twelve million, thirty-one thousand, three hundred twelve".