212543345191 has 2 divisors, whose sum is σ = 212543345192. Its totient is φ = 212543345190.

The previous prime is 212543345141. The next prime is 212543345227. The reversal of 212543345191 is 191543345212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212543345191 - 2²⁹ = 212006474279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212543345141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106271672595 + 106271672596.

It is an arithmetic number, because the mean of its divisors is an integer number (106271672596).

Almost surely, 2^212543345191 is an apocalyptic number.

212543345191 is a deficient number, since it is larger than the sum of its proper divisors (1).

212543345191 is an equidigital number, since it uses as much as digits as its factorization.

212543345191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The spelling of 212543345191 in words is "two hundred twelve billion, five hundred forty-three million, three hundred forty-five thousand, one hundred ninety-one".