311652219997 has 2 divisors, whose sum is σ = 311652219998. Its totient is φ = 311652219996.

The previous prime is 311652219979. The next prime is 311652220013. The reversal of 311652219997 is 799912256113.

Together with previous prime (311652219979) 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., 311638596516 + 13623481 = 558246^2 + 3691^2 .

It is an emirp because it is prime and its reverse (799912256113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311652219997 - 2¹¹ = 311652217949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311652219497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155826109998 + 155826109999.

It is an arithmetic number, because the mean of its divisors is an integer number (155826109999).

Almost surely, 2^311652219997 is an apocalyptic number.

It is an amenable number.

311652219997 is a deficient number, since it is larger than the sum of its proper divisors (1).

311652219997 is an equidigital number, since it uses as much as digits as its factorization.

311652219997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 55.

The spelling of 311652219997 in words is "three hundred eleven billion, six hundred fifty-two million, two hundred nineteen thousand, nine hundred ninety-seven".