312042440117 has 2 divisors, whose sum is σ = 312042440118. Its totient is φ = 312042440116.

The previous prime is 312042440107. The next prime is 312042440159. The reversal of 312042440117 is 711044240213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311999327761 + 43112356 = 558569^2 + 6566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312042440117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312042440117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312042440107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156021220058 + 156021220059.

It is an arithmetic number, because the mean of its divisors is an integer number (156021220059).

Almost surely, 2^312042440117 is an apocalyptic number.

It is an amenable number.

312042440117 is a deficient number, since it is larger than the sum of its proper divisors (1).

312042440117 is an equidigital number, since it uses as much as digits as its factorization.

312042440117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The spelling of 312042440117 in words is "three hundred twelve billion, forty-two million, four hundred forty thousand, one hundred seventeen".