31311043277 has 2 divisors, whose sum is σ = 31311043278. Its totient is φ = 31311043276.

The previous prime is 31311043213. The next prime is 31311043289. The reversal of 31311043277 is 77234011313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20169396361 + 11141646916 = 142019^2 + 105554^2 .

It is a cyclic number.

It is not a de Polignac number, because 31311043277 - 2⁶ = 31311043213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31311043177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655521638 + 15655521639.

It is an arithmetic number, because the mean of its divisors is an integer number (15655521639).

Almost surely, 2^31311043277 is an apocalyptic number.

It is an amenable number.

31311043277 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311043277 is an equidigital number, since it uses as much as digits as its factorization.

31311043277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 32.

The spelling of 31311043277 in words is "thirty-one billion, three hundred eleven million, forty-three thousand, two hundred seventy-seven".