201331317973 has 2 divisors, whose sum is σ = 201331317974. Its totient is φ = 201331317972.

The previous prime is 201331317937. The next prime is 201331317977. The reversal of 201331317973 is 379713133102.

Together with previous prime (201331317937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174959831524 + 26371486449 = 418282^2 + 162393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201331317973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201331317977) 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, 100665658986 + 100665658987.

It is an arithmetic number, because the mean of its divisors is an integer number (100665658987).

Almost surely, 2^201331317973 is an apocalyptic number.

It is an amenable number.

201331317973 is a deficient number, since it is larger than the sum of its proper divisors (1).

201331317973 is an equidigital number, since it uses as much as digits as its factorization.

201331317973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442, while the sum is 40.

The spelling of 201331317973 in words is "two hundred one billion, three hundred thirty-one million, three hundred seventeen thousand, nine hundred seventy-three".