31020130313 has 2 divisors, whose sum is σ = 31020130314. Its totient is φ = 31020130312.

The previous prime is 31020130289. The next prime is 31020130319. The reversal of 31020130313 is 31303102013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17098962169 + 13921168144 = 130763^2 + 117988^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020130313 - 2¹⁰ = 31020129289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31020130291 and 31020130300.

It is not a weakly prime, because it can be changed into another prime (31020130319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510065156 + 15510065157.

It is an arithmetic number, because the mean of its divisors is an integer number (15510065157).

Almost surely, 2^31020130313 is an apocalyptic number.

It is an amenable number.

31020130313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020130313 is an equidigital number, since it uses as much as digits as its factorization.

31020130313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31020130313 its reverse (31303102013), we get a palindrome (62323232326).

The spelling of 31020130313 in words is "thirty-one billion, twenty million, one hundred thirty thousand, three hundred thirteen".