212324440 has 16 divisors (see below), whose sum is σ = 477730080. Its totient is φ = 84929760.

The previous prime is 212324419. The next prime is 212324459. The reversal of 212324440 is 44423212.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2654016 + ... + 2654095.

It is an arithmetic number, because the mean of its divisors is an integer number (29858130).

Almost surely, 2^212324440 is an apocalyptic number.

212324440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212324440 is an abundant number, since it is smaller than the sum of its proper divisors (265405640).

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

212324440 is a wasteful number, since it uses less digits than its factorization.

212324440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5308122 (or 5308118 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 212324440 is about 14571.3568345573. The cubic root of 212324440 is about 596.5772150718.

Adding to 212324440 its reverse (44423212), we get a palindrome (256747652).

The spelling of 212324440 in words is "two hundred twelve million, three hundred twenty-four thousand, four hundred forty".