312863323368181 has 2 divisors, whose sum is σ = 312863323368182. Its totient is φ = 312863323368180.

The previous prime is 312863323368149. The next prime is 312863323368247. The reversal of 312863323368181 is 181863323368213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218463328055025 + 94399995313156 = 14780505^2 + 9715966^2 .

It is a cyclic number.

It is not a de Polignac number, because 312863323368181 - 2⁵ = 312863323368149 is a prime.

It is a super-2 number, since 2×312863323368181² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312863323363181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156431661684090 + 156431661684091.

It is an arithmetic number, because the mean of its divisors is an integer number (156431661684091).

Almost surely, 2^{312863323368181} is an apocalyptic number.

It is an amenable number.

312863323368181 is a deficient number, since it is larger than the sum of its proper divisors (1).

312863323368181 is an equidigital number, since it uses as much as digits as its factorization.

312863323368181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17915904, while the sum is 58.

The spelling of 312863323368181 in words is "three hundred twelve trillion, eight hundred sixty-three billion, three hundred twenty-three million, three hundred sixty-eight thousand, one hundred eighty-one".