311198817827 has 2 divisors, whose sum is σ = 311198817828. Its totient is φ = 311198817826.

The previous prime is 311198817803. The next prime is 311198817883. The reversal of 311198817827 is 728718891113.

It is an a-pointer prime, because the next prime (311198817883) can be obtained adding 311198817827 to its sum of digits (56).

It is a weak prime.

It is an emirp because it is prime and its reverse (728718891113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311198817827 - 2³⁸ = 36320910883 is a prime.

It is not a weakly prime, because it can be changed into another prime (311198814827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155599408913 + 155599408914.

It is an arithmetic number, because the mean of its divisors is an integer number (155599408914).

Almost surely, 2^311198817827 is an apocalyptic number.

311198817827 is a deficient number, since it is larger than the sum of its proper divisors (1).

311198817827 is an equidigital number, since it uses as much as digits as its factorization.

311198817827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 56.

The spelling of 311198817827 in words is "three hundred eleven billion, one hundred ninety-eight million, eight hundred seventeen thousand, eight hundred twenty-seven".