312045521515069 has 2 divisors, whose sum is σ = 312045521515070. Its totient is φ = 312045521515068.

The previous prime is 312045521515051. The next prime is 312045521515109. The reversal of 312045521515069 is 960515125540213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309728848783225 + 2316672731844 = 17599115^2 + 1522062^2 .

It is an emirp because it is prime and its reverse (960515125540213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312045521515069 - 2⁷ = 312045521514941 is a prime.

It is a super-2 number, since 2×312045521515069² (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 (312045521515019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156022760757534 + 156022760757535.

It is an arithmetic number, because the mean of its divisors is an integer number (156022760757535).

Almost surely, 2^{312045521515069} is an apocalyptic number.

It is an amenable number.

312045521515069 is a deficient number, since it is larger than the sum of its proper divisors (1).

312045521515069 is an equidigital number, since it uses as much as digits as its factorization.

312045521515069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620000, while the sum is 49.

The spelling of 312045521515069 in words is "three hundred twelve trillion, forty-five billion, five hundred twenty-one million, five hundred fifteen thousand, sixty-nine".