212686332 has 24 divisors (see below), whose sum is σ = 496541136. Its totient is φ = 70856448.

The previous prime is 212686301. The next prime is 212686349. The reversal of 212686332 is 233686212.

It is a happy number.

It is a super-2 number, since 2×212686332² = 90470951639228448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212686293 and 212686302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25338 + ... + 32670.

It is an arithmetic number, because the mean of its divisors is an integer number (20689214).

Almost surely, 2^212686332 is an apocalyptic number.

It is an amenable number.

212686332 is an abundant number, since it is smaller than the sum of its proper divisors (283854804).

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

212686332 is a wasteful number, since it uses less digits than its factorization.

212686332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9757 (or 9755 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 212686332 is about 14583.7694715735. The cubic root of 212686332 is about 596.9159639183.

The spelling of 212686332 in words is "two hundred twelve million, six hundred eighty-six thousand, three hundred thirty-two".