311223201547 has 2 divisors, whose sum is σ = 311223201548. Its totient is φ = 311223201546.

The previous prime is 311223201433. The next prime is 311223201551. The reversal of 311223201547 is 745102322113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311223201547 is a prime.

It is not a weakly prime, because it can be changed into another prime (311223201577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155611600773 + 155611600774.

It is an arithmetic number, because the mean of its divisors is an integer number (155611600774).

Almost surely, 2^311223201547 is an apocalyptic number.

311223201547 is a deficient number, since it is larger than the sum of its proper divisors (1).

311223201547 is an equidigital number, since it uses as much as digits as its factorization.

311223201547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 311223201547 in words is "three hundred eleven billion, two hundred twenty-three million, two hundred one thousand, five hundred forty-seven".