31031110103 has 16 divisors (see below), whose sum is σ = 36246965760. Its totient is φ = 26015839200.

The previous prime is 31031110073. The next prime is 31031110109. The reversal of 31031110103 is 30101113013.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31031110103 - 2¹⁸ = 31030847959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031110109) 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, 126563 + ... + 279428.

It is an arithmetic number, because the mean of its divisors is an integer number (2265435360).

Almost surely, 2^31031110103 is an apocalyptic number.

31031110103 is a deficient number, since it is larger than the sum of its proper divisors (5215855657).

31031110103 is a wasteful number, since it uses less digits than its factorization.

31031110103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406238.

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

Adding to 31031110103 its reverse (30101113013), we get a palindrome (61132223116).

The spelling of 31031110103 in words is "thirty-one billion, thirty-one million, one hundred ten thousand, one hundred three".