31313113113 has 16 divisors (see below), whose sum is σ = 43114323456. Its totient is φ = 20194177920.

The previous prime is 31313112979. The next prime is 31313113141. The reversal of 31313113113 is 31131131313.

It is not a de Polignac number, because 31313113113 - 2⁹ = 31313112601 is a prime.

It is a super-2 number, since 2×31313113113² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 31313113113.

It is not an unprimeable number, because it can be changed into a prime (31313113163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180931 + ... + 308807.

It is an arithmetic number, because the mean of its divisors is an integer number (2694645216).

Almost surely, 2^31313113113 is an apocalyptic number.

It is an amenable number.

31313113113 is a deficient number, since it is larger than the sum of its proper divisors (11801210343).

31313113113 is a wasteful number, since it uses less digits than its factorization.

31313113113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130544.

The product of its digits is 243, while the sum is 21.

Adding to 31313113113 its reverse (31131131313), we get a palindrome (62444244426).

The spelling of 31313113113 in words is "thirty-one billion, three hundred thirteen million, one hundred thirteen thousand, one hundred thirteen".