212183622689 has 2 divisors, whose sum is σ = 212183622690. Its totient is φ = 212183622688.

The previous prime is 212183622649. The next prime is 212183622709. The reversal of 212183622689 is 986226381212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133523006464 + 78660616225 = 365408^2 + 280465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212183622689 is a prime.

It is not a weakly prime, because it can be changed into another prime (212183622649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106091811344 + 106091811345.

It is an arithmetic number, because the mean of its divisors is an integer number (106091811345).

Almost surely, 2^212183622689 is an apocalyptic number.

It is an amenable number.

212183622689 is a deficient number, since it is larger than the sum of its proper divisors (1).

212183622689 is an equidigital number, since it uses as much as digits as its factorization.

212183622689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 50.

The spelling of 212183622689 in words is "two hundred twelve billion, one hundred eighty-three million, six hundred twenty-two thousand, six hundred eighty-nine".