31130332313 has 4 divisors (see below), whose sum is σ = 31163205840. Its totient is φ = 31097458788.

The previous prime is 31130332283. The next prime is 31130332319. The reversal of 31130332313 is 31323303113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31323303113 = 137 ⋅228637249.

It is a cyclic number.

It is not a de Polignac number, because 31130332313 - 2¹⁰ = 31130331289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31130332319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16435343 + ... + 16437236.

It is an arithmetic number, because the mean of its divisors is an integer number (7790801460).

Almost surely, 2^31130332313 is an apocalyptic number.

It is an amenable number.

31130332313 is a deficient number, since it is larger than the sum of its proper divisors (32873527).

31130332313 is an equidigital number, since it uses as much as digits as its factorization.

31130332313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32873526.

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 31130332313 its reverse (31323303113), we get a palindrome (62453635426).

The spelling of 31130332313 in words is "thirty-one billion, one hundred thirty million, three hundred thirty-two thousand, three hundred thirteen".