212370331638 has 8 divisors (see below), whose sum is σ = 424740663288. Its totient is φ = 70790110544.

The previous prime is 212370331627. The next prime is 212370331639. The reversal of 212370331638 is 836133073212.

212370331638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

212370331638 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 212370331596 and 212370331605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212370331639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17697527631 + ... + 17697527642.

It is an arithmetic number, because the mean of its divisors is an integer number (53092582911).

Almost surely, 2^212370331638 is an apocalyptic number.

212370331638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212370331638 is a wasteful number, since it uses less digits than its factorization.

212370331638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35395055278.

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 212370331638 in words is "two hundred twelve billion, three hundred seventy million, three hundred thirty-one thousand, six hundred thirty-eight".