311323101157 has 2 divisors, whose sum is σ = 311323101158. Its totient is φ = 311323101156.

The previous prime is 311323101119. The next prime is 311323101223. The reversal of 311323101157 is 751101323113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197532246916 + 113790854241 = 444446^2 + 337329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311323101157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311323101757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155661550578 + 155661550579.

It is an arithmetic number, because the mean of its divisors is an integer number (155661550579).

Almost surely, 2^311323101157 is an apocalyptic number.

It is an amenable number.

311323101157 is a deficient number, since it is larger than the sum of its proper divisors (1).

311323101157 is an equidigital number, since it uses as much as digits as its factorization.

311323101157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 28.

The spelling of 311323101157 in words is "three hundred eleven billion, three hundred twenty-three million, one hundred one thousand, one hundred fifty-seven".