315106665605197 has 2 divisors, whose sum is σ = 315106665605198. Its totient is φ = 315106665605196.

The previous prime is 315106665605129. The next prime is 315106665605243. The reversal of 315106665605197 is 791506566601513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186416041537476 + 128690624067721 = 13653426^2 + 11344189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315106665605197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315106663605197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157553332802598 + 157553332802599.

It is an arithmetic number, because the mean of its divisors is an integer number (157553332802599).

Almost surely, 2^{315106665605197} is an apocalyptic number.

It is an amenable number.

315106665605197 is a deficient number, since it is larger than the sum of its proper divisors (1).

315106665605197 is an equidigital number, since it uses as much as digits as its factorization.

315106665605197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618000, while the sum is 61.

The spelling of 315106665605197 in words is "three hundred fifteen trillion, one hundred six billion, six hundred sixty-five million, six hundred five thousand, one hundred ninety-seven".