31313110113 has 32 divisors (see below), whose sum is σ = 50022403200. Its totient is φ = 19294329600.

The previous prime is 31313110079. The next prime is 31313110117. The reversal of 31313110113 is 31101131313.

It is not a de Polignac number, because 31313110113 - 2¹³ = 31313101921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31313110117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 723348 + ... + 765413.

It is an arithmetic number, because the mean of its divisors is an integer number (1563200100).

Almost surely, 2^31313110113 is an apocalyptic number.

It is an amenable number.

31313110113 is a deficient number, since it is larger than the sum of its proper divisors (18709293087).

31313110113 is a wasteful number, since it uses less digits than its factorization.

31313110113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488830 (or 1488824 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

Adding to 31313110113 its reverse (31101131313), we get a palindrome (62414241426).

The spelling of 31313110113 in words is "thirty-one billion, three hundred thirteen million, one hundred ten thousand, one hundred thirteen".