212644522443 has 4 divisors (see below), whose sum is σ = 283526029928. Its totient is φ = 141763014960.

The previous prime is 212644522439. The next prime is 212644522451. The reversal of 212644522443 is 344225446212.

212644522443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212644522443 - 2² = 212644522439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212644522243) 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, 35440753738 + ... + 35440753743.

It is an arithmetic number, because the mean of its divisors is an integer number (70881507482).

Almost surely, 2^212644522443 is an apocalyptic number.

212644522443 is a deficient number, since it is larger than the sum of its proper divisors (70881507485).

212644522443 is an equidigital number, since it uses as much as digits as its factorization.

212644522443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70881507484.

The product of its digits is 368640, while the sum is 39.

Adding to 212644522443 its reverse (344225446212), we get a palindrome (556869968655).

The spelling of 212644522443 in words is "two hundred twelve billion, six hundred forty-four million, five hundred twenty-two thousand, four hundred forty-three".