31321231232303 has 4 divisors (see below), whose sum is σ = 31335145597608. Its totient is φ = 31307316867000.

The previous prime is 31321231232293. The next prime is 31321231232311. The reversal of 31321231232303 is 30323213212313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31321231232303 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 (31321231232503) 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, 6957179276 + ... + 6957183777.

It is an arithmetic number, because the mean of its divisors is an integer number (7833786399402).

Almost surely, 2^{31321231232303} is an apocalyptic number.

31321231232303 is a deficient number, since it is larger than the sum of its proper divisors (13914365305).

31321231232303 is a wasteful number, since it uses less digits than its factorization.

31321231232303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13914365304.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 31321231232303 its reverse (30323213212313), we get a palindrome (61644444444616).

The spelling of 31321231232303 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred thirty-one million, two hundred thirty-two thousand, three hundred three".