212210432340 has 24 divisors (see below), whose sum is σ = 594189210720. Its totient is φ = 56589448608.

The previous prime is 212210432321. The next prime is 212210432407. The reversal of 212210432340 is 43234012212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212210432340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768420210 + ... + 1768420329.

It is an arithmetic number, because the mean of its divisors is an integer number (24757883780).

Almost surely, 2^212210432340 is an apocalyptic number.

212210432340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212210432340 is an abundant number, since it is smaller than the sum of its proper divisors (381978778380).

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

212210432340 is a wasteful number, since it uses less digits than its factorization.

212210432340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536840551 (or 3536840549 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 212210432340 its reverse (43234012212), we get a palindrome (255444444552).

The spelling of 212210432340 in words is "two hundred twelve billion, two hundred ten million, four hundred thirty-two thousand, three hundred forty".