311533131236321 has 2 divisors, whose sum is σ = 311533131236322. Its totient is φ = 311533131236320.

The previous prime is 311533131236273. The next prime is 311533131236333. The reversal of 311533131236321 is 123632131335113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167161756101025 + 144371375135296 = 12929105^2 + 12015464^2 .

It is a cyclic number.

It is not a de Polignac number, because 311533131236321 - 2³⁸ = 311258253329377 is a prime.

It is not a weakly prime, because it can be changed into another prime (311533131236381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155766565618160 + 155766565618161.

It is an arithmetic number, because the mean of its divisors is an integer number (155766565618161).

Almost surely, 2^{311533131236321} is an apocalyptic number.

It is an amenable number.

311533131236321 is a deficient number, since it is larger than the sum of its proper divisors (1).

311533131236321 is an equidigital number, since it uses as much as digits as its factorization.

311533131236321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 38.

The spelling of 311533131236321 in words is "three hundred eleven trillion, five hundred thirty-three billion, one hundred thirty-one million, two hundred thirty-six thousand, three hundred twenty-one".