212213372644 has 144 divisors (see below), whose sum is σ = 490783278720. Its totient is φ = 79361856000.

The previous prime is 212213372621. The next prime is 212213372687. The reversal of 212213372644 is 446273312212.

212213372644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 23572144 + ... + 23581144.

Almost surely, 2^212213372644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212213372644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245391639360).

212213372644 is an abundant number, since it is smaller than the sum of its proper divisors (278569906076).

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

212213372644 is a wasteful number, since it uses less digits than its factorization.

212213372644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9538 (or 9529 counting only the distinct ones).

The product of its digits is 96768, while the sum is 37.

Adding to 212213372644 its reverse (446273312212), we get a palindrome (658486684856).

The spelling of 212213372644 in words is "two hundred twelve billion, two hundred thirteen million, three hundred seventy-two thousand, six hundred forty-four".