31131330103 has 12 divisors (see below), whose sum is σ = 31958307480. Its totient is φ = 30325152816.

The previous prime is 31131330077. The next prime is 31131330107. The reversal of 31131330103 is 30103313113.

It is a happy number.

It is not a de Polignac number, because 31131330103 - 2⁹ = 31131329591 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 (31131330107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 667108 + ... + 712246.

It is an arithmetic number, because the mean of its divisors is an integer number (2663192290).

Almost surely, 2^31131330103 is an apocalyptic number.

31131330103 is a deficient number, since it is larger than the sum of its proper divisors (826977377).

31131330103 is an equidigital number, since it uses as much as digits as its factorization.

31131330103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45598 (or 45555 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 19.

Adding to 31131330103 its reverse (30103313113), we get a palindrome (61234643216).

The spelling of 31131330103 in words is "thirty-one billion, one hundred thirty-one million, three hundred thirty thousand, one hundred three".