31320210103 has 32 divisors (see below), whose sum is σ = 39601981440. Its totient is φ = 24253014240.

The previous prime is 31320210079. The next prime is 31320210137. The reversal of 31320210103 is 30101202313.

It is a de Polignac number, because none of the positive numbers 2^k-31320210103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320210193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 701148 + ... + 744478.

It is an arithmetic number, because the mean of its divisors is an integer number (1237561920).

Almost surely, 2^31320210103 is an apocalyptic number.

31320210103 is a deficient number, since it is larger than the sum of its proper divisors (8281771337).

31320210103 is an equidigital number, since it uses as much as digits as its factorization.

31320210103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43424 (or 43398 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31320210103 its reverse (30101202313), we get a palindrome (61421412416).

The spelling of 31320210103 in words is "thirty-one billion, three hundred twenty million, two hundred ten thousand, one hundred three".