231322306443973 has 2 divisors, whose sum is σ = 231322306443974. Its totient is φ = 231322306443972.

The previous prime is 231322306443971. The next prime is 231322306444067. The reversal of 231322306443973 is 379344603223132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187849145521249 + 43473160922724 = 13705807^2 + 6593418^2 .

It is a cyclic number.

It is not a de Polignac number, because 231322306443973 - 2¹ = 231322306443971 is a prime.

Together with 231322306443971, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 231322306443973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231322306443971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115661153221986 + 115661153221987.

It is an arithmetic number, because the mean of its divisors is an integer number (115661153221987).

Almost surely, 2^{231322306443973} is an apocalyptic number.

It is an amenable number.

231322306443973 is a deficient number, since it is larger than the sum of its proper divisors (1).

231322306443973 is an equidigital number, since it uses as much as digits as its factorization.

231322306443973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 52.

The spelling of 231322306443973 in words is "two hundred thirty-one trillion, three hundred twenty-two billion, three hundred six million, four hundred forty-three thousand, nine hundred seventy-three".