312404241665521 has 2 divisors, whose sum is σ = 312404241665522. Its totient is φ = 312404241665520.

The previous prime is 312404241665513. The next prime is 312404241665627. The reversal of 312404241665521 is 125566142404213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299741319415521 + 12662922250000 = 17313039^2 + 3558500^2 .

It is a cyclic number.

It is not a de Polignac number, because 312404241665521 - 2³ = 312404241665513 is a prime.

It is not a weakly prime, because it can be changed into another prime (312404241695521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156202120832760 + 156202120832761.

It is an arithmetic number, because the mean of its divisors is an integer number (156202120832761).

Almost surely, 2^{312404241665521} is an apocalyptic number.

It is an amenable number.

312404241665521 is a deficient number, since it is larger than the sum of its proper divisors (1).

312404241665521 is an equidigital number, since it uses as much as digits as its factorization.

312404241665521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 312404241665521 in words is "three hundred twelve trillion, four hundred four billion, two hundred forty-one million, six hundred sixty-five thousand, five hundred twenty-one".