31313130131 has 4 divisors (see below), whose sum is σ = 31358977272. Its totient is φ = 31267282992.

The previous prime is 31313130119. The next prime is 31313130137. The reversal of 31313130131 is 13103131313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31313130131 - 2⁶ = 31313130067 is a prime.

It is a super-2 number, since 2×31313130131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313130137) 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 3 ways as a sum of consecutive naturals, for example, 22922546 + ... + 22923911.

It is an arithmetic number, because the mean of its divisors is an integer number (7839744318).

Almost surely, 2^31313130131 is an apocalyptic number.

31313130131 is a deficient number, since it is larger than the sum of its proper divisors (45847141).

31313130131 is an equidigital number, since it uses as much as digits as its factorization.

31313130131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45847140.

The product of its (nonzero) digits is 243, while the sum is 20.

Adding to 31313130131 its reverse (13103131313), we get a palindrome (44416261444).

The spelling of 31313130131 in words is "thirty-one billion, three hundred thirteen million, one hundred thirty thousand, one hundred thirty-one".