31131332323 has 12 divisors (see below), whose sum is σ = 38526012048. Its totient is φ = 24631382880.

The previous prime is 31131332321. The next prime is 31131332329. The reversal of 31131332323 is 32323313113.

It is not a de Polignac number, because 31131332323 - 2¹ = 31131332321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31131332321) 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, 13156608 + ... + 13158973.

It is an arithmetic number, because the mean of its divisors is an integer number (3210501004).

Almost surely, 2^31131332323 is an apocalyptic number.

31131332323 is a deficient number, since it is larger than the sum of its proper divisors (7394679725).

31131332323 is a wasteful number, since it uses less digits than its factorization.

31131332323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26315614 (or 26315601 counting only the distinct ones).

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

Adding to 31131332323 its reverse (32323313113), we get a palindrome (63454645436).

The spelling of 31131332323 in words is "thirty-one billion, one hundred thirty-one million, three hundred thirty-two thousand, three hundred twenty-three".