31130455313 has 12 divisors (see below), whose sum is σ = 31975807500. Its totient is φ = 30304097280.

The previous prime is 31130455283. The next prime is 31130455319. The reversal of 31130455313 is 31355403113.

It can be written as a sum of positive squares in 6 ways, for example, as 2808258049 + 28322197264 = 52993^2 + 168292^2 .

It is not a de Polignac number, because 31130455313 - 2⁶ = 31130455249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130455319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317813 + ... + 404061.

It is an arithmetic number, because the mean of its divisors is an integer number (2664650625).

Almost surely, 2^31130455313 is an apocalyptic number.

It is an amenable number.

31130455313 is a deficient number, since it is larger than the sum of its proper divisors (845352187).

31130455313 is an frugal number, since it uses more digits than its factorization.

31130455313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86468 (or 86407 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 29.

Adding to 31130455313 its reverse (31355403113), we get a palindrome (62485858426).

The spelling of 31130455313 in words is "thirty-one billion, one hundred thirty million, four hundred fifty-five thousand, three hundred thirteen".