3131331023 has 4 divisors (see below), whose sum is σ = 3131459160. Its totient is φ = 3131202888.

The previous prime is 3131331019. The next prime is 3131331059. The reversal of 3131331023 is 3201331313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3201331313 = 2371 ⋅1350203.

It is a cyclic number.

It is not a de Polignac number, because 3131331023 - 2² = 3131331019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131330986 and 3131331004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131331083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14765 + ... + 80502.

It is an arithmetic number, because the mean of its divisors is an integer number (782864790).

Almost surely, 2^3131331023 is an apocalyptic number.

3131331023 is a deficient number, since it is larger than the sum of its proper divisors (128137).

3131331023 is an equidigital number, since it uses as much as digits as its factorization.

3131331023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128136.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 3131331023 is about 55958.2971774517. The cubic root of 3131331023 is about 1462.9955110406.

Adding to 3131331023 its reverse (3201331313), we get a palindrome (6332662336).

The spelling of 3131331023 in words is "three billion, one hundred thirty-one million, three hundred thirty-one thousand, twenty-three".