522343209311981 has 2 divisors, whose sum is σ = 522343209311982. Its totient is φ = 522343209311980.

The previous prime is 522343209311947. The next prime is 522343209312011. The reversal of 522343209311981 is 189113902343225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 507144049379881 + 15199159932100 = 22519859^2 + 3898610^2 .

It is a cyclic number.

It is not a de Polignac number, because 522343209311981 - 2²² = 522343205117677 is a prime.

It is a super-2 number, since 2×522343209311981² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522343209311081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261171604655990 + 261171604655991.

It is an arithmetic number, because the mean of its divisors is an integer number (261171604655991).

Almost surely, 2^{522343209311981} is an apocalyptic number.

It is an amenable number.

522343209311981 is a deficient number, since it is larger than the sum of its proper divisors (1).

522343209311981 is an equidigital number, since it uses as much as digits as its factorization.

522343209311981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 522343209311981 in words is "five hundred twenty-two trillion, three hundred forty-three billion, two hundred nine million, three hundred eleven thousand, nine hundred eighty-one".