31103110013 has 4 divisors (see below), whose sum is σ = 32455419168. Its totient is φ = 29750800860.

The previous prime is 31103110007. The next prime is 31103110033. The reversal of 31103110013 is 31001130113.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 31103110013 - 2⁶ = 31103109949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31103110013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103110033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676154543 + ... + 676154588.

It is an arithmetic number, because the mean of its divisors is an integer number (8113854792).

Almost surely, 2^31103110013 is an apocalyptic number.

It is an amenable number.

31103110013 is a deficient number, since it is larger than the sum of its proper divisors (1352309155).

31103110013 is a wasteful number, since it uses less digits than its factorization.

31103110013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352309154.

The product of its (nonzero) digits is 27, while the sum is 14.

Adding to 31103110013 its reverse (31001130113), we get a palindrome (62104240126).

The spelling of 31103110013 in words is "thirty-one billion, one hundred three million, one hundred ten thousand, thirteen".