31331231323 has 32 divisors (see below), whose sum is σ = 38073456000. Its totient is φ = 25216773120.

The previous prime is 31331231263. The next prime is 31331231329. The reversal of 31331231323 is 32313213313.

It is not a de Polignac number, because 31331231323 - 2²¹ = 31329134171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331231329) 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, 1087873 + ... + 1116301.

It is an arithmetic number, because the mean of its divisors is an integer number (1189795500).

Almost surely, 2^31331231323 is an apocalyptic number.

31331231323 is a deficient number, since it is larger than the sum of its proper divisors (6742224677).

31331231323 is a wasteful number, since it uses less digits than its factorization.

31331231323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28615.

The product of its digits is 2916, while the sum is 25.

Adding to 31331231323 its reverse (32313213313), we get a palindrome (63644444636).

The spelling of 31331231323 in words is "thirty-one billion, three hundred thirty-one million, two hundred thirty-one thousand, three hundred twenty-three".