31313402131 has 8 divisors (see below), whose sum is σ = 34543897200. Its totient is φ = 28146877440.

The previous prime is 31313402101. The next prime is 31313402173. The reversal of 31313402131 is 13120431313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31313402131 - 2⁹ = 31313401619 is a prime.

It is a super-2 number, since 2×31313402131² (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 (31313402101) 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 7 ways as a sum of consecutive naturals, for example, 15991566 + ... + 15993523.

It is an arithmetic number, because the mean of its divisors is an integer number (4317987150).

Almost surely, 2^31313402131 is an apocalyptic number.

31313402131 is a deficient number, since it is larger than the sum of its proper divisors (3230495069).

31313402131 is a wasteful number, since it uses less digits than its factorization.

31313402131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31985189.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31313402131 its reverse (13120431313), we get a palindrome (44433833444).

The spelling of 31313402131 in words is "thirty-one billion, three hundred thirteen million, four hundred two thousand, one hundred thirty-one".