313243131321 has 6 divisors (see below), whose sum is σ = 452462300810. Its totient is φ = 208828754208.

The previous prime is 313243131287. The next prime is 313243131359. The reversal of 313243131321 is 123131342313.

313243131321 is a `hidden beast` number, since 3 + 1 + 3 + 24 + 313 + 1 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 173606388921 + 139636742400 = 416661^2 + 373680^2 .

It is not a de Polignac number, because 313243131321 - 2¹⁴ = 313243114937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313243131221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17402396176 + ... + 17402396193.

Almost surely, 2^313243131321 is an apocalyptic number.

It is an amenable number.

313243131321 is a deficient number, since it is larger than the sum of its proper divisors (139219169489).

313243131321 is a wasteful number, since it uses less digits than its factorization.

313243131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34804792375 (or 34804792372 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 313243131321 its reverse (123131342313), we get a palindrome (436374473634).

The spelling of 313243131321 in words is "three hundred thirteen billion, two hundred forty-three million, one hundred thirty-one thousand, three hundred twenty-one".