212311424 has 32 divisors (see below), whose sum is σ = 455503440. Its totient is φ = 97989120.

The previous prime is 212311417. The next prime is 212311447. The reversal of 212311424 is 424113212.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×212311424² = 90152281521815552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212311396 and 212311405.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 62132 + ... + 65459.

Almost surely, 2^212311424 is an apocalyptic number.

It is an amenable number.

212311424 is an abundant number, since it is smaller than the sum of its proper divisors (243192016).

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

212311424 is a wasteful number, since it uses less digits than its factorization.

212311424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127618 (or 127606 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 212311424 is about 14570.9101980624. The cubic root of 212311424 is about 596.5650242822.

Adding to 212311424 its reverse (424113212), we get a palindrome (636424636).

The spelling of 212311424 in words is "two hundred twelve million, three hundred eleven thousand, four hundred twenty-four".