31103213103 has 6 divisors (see below), whose sum is σ = 44926863384. Its totient is φ = 20735475396.

The previous prime is 31103213083. The next prime is 31103213117. The reversal of 31103213103 is 30131230113.

It is a happy number.

31103213103 is a `hidden beast` number, since 31 + 1 + 0 + 321 + 310 + 3 = 666.

It is not a de Polignac number, because 31103213103 - 2¹⁰ = 31103212079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103213203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1727956275 + ... + 1727956292.

It is an arithmetic number, because the mean of its divisors is an integer number (7487810564).

Almost surely, 2^31103213103 is an apocalyptic number.

31103213103 is a deficient number, since it is larger than the sum of its proper divisors (13823650281).

31103213103 is a wasteful number, since it uses less digits than its factorization.

31103213103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455912573 (or 3455912570 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31103213103 its reverse (30131230113), we get a palindrome (61234443216).

The spelling of 31103213103 in words is "thirty-one billion, one hundred three million, two hundred thirteen thousand, one hundred three".