213443310991 has 2 divisors, whose sum is σ = 213443310992. Its totient is φ = 213443310990.

The previous prime is 213443310979. The next prime is 213443311013. The reversal of 213443310991 is 199013344312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213443310991 - 2⁷ = 213443310863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213443310391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106721655495 + 106721655496.

It is an arithmetic number, because the mean of its divisors is an integer number (106721655496).

Almost surely, 2^213443310991 is an apocalyptic number.

213443310991 is a deficient number, since it is larger than the sum of its proper divisors (1).

213443310991 is an equidigital number, since it uses as much as digits as its factorization.

213443310991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 213443310991 in words is "two hundred thirteen billion, four hundred forty-three million, three hundred ten thousand, nine hundred ninety-one".