212239722 has 16 divisors (see below), whose sum is σ = 442935360. Its totient is φ = 67670592.

The previous prime is 212239721. The next prime is 212239759. The reversal of 212239722 is 227932212.

It is a self number, because there is not a number n which added to its sum of digits gives 212239722.

It is not an unprimeable number, because it can be changed into a prime (212239721) 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 7 ways as a sum of consecutive naturals, for example, 768847 + ... + 769122.

It is an arithmetic number, because the mean of its divisors is an integer number (27683460).

Almost surely, 2^212239722 is an apocalyptic number.

212239722 is an abundant number, since it is smaller than the sum of its proper divisors (230695638).

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

212239722 is a wasteful number, since it uses less digits than its factorization.

212239722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537997.

The product of its digits is 6048, while the sum is 30.

The square root of 212239722 is about 14568.4495400163. The cubic root of 212239722 is about 596.4978592332.

The spelling of 212239722 in words is "two hundred twelve million, two hundred thirty-nine thousand, seven hundred twenty-two".