313121026530265 has 16 divisors (see below), whose sum is σ = 397856221394832. Its totient is φ = 235756778471424.

The previous prime is 313121026530199. The next prime is 313121026530283. The reversal of 313121026530265 is 562035620121313.

It can be written as a sum of positive squares in 8 ways, for example, as 28737458297289 + 284383568232976 = 5360733^2 + 16863676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313121026530265 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34472904 + ... + 42598393.

It is an arithmetic number, because the mean of its divisors is an integer number (24866013837177).

Almost surely, 2^{313121026530265} is an apocalyptic number.

It is an amenable number.

313121026530265 is a deficient number, since it is larger than the sum of its proper divisors (84735194864567).

313121026530265 is a wasteful number, since it uses less digits than its factorization.

313121026530265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77119116.

The product of its (nonzero) digits is 194400, while the sum is 40.

Adding to 313121026530265 its reverse (562035620121313), we get a palindrome (875156646651578).

The spelling of 313121026530265 in words is "three hundred thirteen trillion, one hundred twenty-one billion, twenty-six million, five hundred thirty thousand, two hundred sixty-five".