311720721375227 has 16 divisors (see below), whose sum is σ = 319540724236800. Its totient is φ = 303950627152032.

The previous prime is 311720721375149. The next prime is 311720721375251. The reversal of 311720721375227 is 722573127027113.

It is not a de Polignac number, because 311720721375227 - 2¹⁴ = 311720721358843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311720721375527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65523713 + ... + 70119885.

It is an arithmetic number, because the mean of its divisors is an integer number (19971295264800).

Almost surely, 2^{311720721375227} is an apocalyptic number.

311720721375227 is a deficient number, since it is larger than the sum of its proper divisors (7820002861573).

311720721375227 is a wasteful number, since it uses less digits than its factorization.

311720721375227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601602.

The product of its (nonzero) digits is 1728720, while the sum is 50.

The spelling of 311720721375227 in words is "three hundred eleven trillion, seven hundred twenty billion, seven hundred twenty-one million, three hundred seventy-five thousand, two hundred twenty-seven".