212840022 has 32 divisors (see below), whose sum is σ = 451733760. Its totient is φ = 66709280.

The previous prime is 212839969. The next prime is 212840053. The reversal of 212840022 is 220048212.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 4929 + ... + 21212.

It is an arithmetic number, because the mean of its divisors is an integer number (14116680).

Almost surely, 2^212840022 is an apocalyptic number.

212840022 is an abundant number, since it is smaller than the sum of its proper divisors (238893738).

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

212840022 is a wasteful number, since it uses less digits than its factorization.

212840022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26228.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 212840022 is about 14589.0377338603. The cubic root of 212840022 is about 597.0597091306.

Adding to 212840022 its reverse (220048212), we get a palindrome (432888234).

The spelling of 212840022 in words is "two hundred twelve million, eight hundred forty thousand, twenty-two".