311555155150097 has 2 divisors, whose sum is σ = 311555155150098. Its totient is φ = 311555155150096.

The previous prime is 311555155150067. The next prime is 311555155150123. The reversal of 311555155150097 is 790051551555113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294366801008641 + 17188354141456 = 17157121^2 + 4145884^2 .

It is a cyclic number.

It is not a de Polignac number, because 311555155150097 - 2³² = 311550860182801 is a prime.

It is a super-2 number, since 2×311555155150097² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311555155150067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155777577575048 + 155777577575049.

It is an arithmetic number, because the mean of its divisors is an integer number (155777577575049).

Almost surely, 2^{311555155150097} is an apocalyptic number.

It is an amenable number.

311555155150097 is a deficient number, since it is larger than the sum of its proper divisors (1).

311555155150097 is an equidigital number, since it uses as much as digits as its factorization.

311555155150097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2953125, while the sum is 53.

The spelling of 311555155150097 in words is "three hundred eleven trillion, five hundred fifty-five billion, one hundred fifty-five million, one hundred fifty thousand, ninety-seven".