212644522439 has 2 divisors, whose sum is σ = 212644522440. Its totient is φ = 212644522438.

The previous prime is 212644522369. The next prime is 212644522451. The reversal of 212644522439 is 934225446212.

212644522439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212644522439 - 2¹⁶ = 212644456903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212644522439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212644522459) 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 as a sum of consecutive naturals, namely, 106322261219 + 106322261220.

It is an arithmetic number, because the mean of its divisors is an integer number (106322261220).

Almost surely, 2^212644522439 is an apocalyptic number.

212644522439 is a deficient number, since it is larger than the sum of its proper divisors (1).

212644522439 is an equidigital number, since it uses as much as digits as its factorization.

212644522439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 44.

The spelling of 212644522439 in words is "two hundred twelve billion, six hundred forty-four million, five hundred twenty-two thousand, four hundred thirty-nine".