312544445197 has 2 divisors, whose sum is σ = 312544445198. Its totient is φ = 312544445196.

The previous prime is 312544445173. The next prime is 312544445201. The reversal of 312544445197 is 791544445213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307241838436 + 5302606761 = 554294^2 + 72819^2 .

It is an emirp because it is prime and its reverse (791544445213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312544445197 - 2¹¹ = 312544443149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312544445197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312544445897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156272222598 + 156272222599.

It is an arithmetic number, because the mean of its divisors is an integer number (156272222599).

Almost surely, 2^312544445197 is an apocalyptic number.

It is an amenable number.

312544445197 is a deficient number, since it is larger than the sum of its proper divisors (1).

312544445197 is an equidigital number, since it uses as much as digits as its factorization.

312544445197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 49.

The spelling of 312544445197 in words is "three hundred twelve billion, five hundred forty-four million, four hundred forty-five thousand, one hundred ninety-seven".