31043023031 has 2 divisors, whose sum is σ = 31043023032. Its totient is φ = 31043023030.

The previous prime is 31043023027. The next prime is 31043023049. The reversal of 31043023031 is 13032034013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31043023031 - 2² = 31043023027 is a prime.

It is a super-2 number, since 2×31043023031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31043022994 and 31043023012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31043023021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15521511515 + 15521511516.

It is an arithmetic number, because the mean of its divisors is an integer number (15521511516).

Almost surely, 2^31043023031 is an apocalyptic number.

31043023031 is a deficient number, since it is larger than the sum of its proper divisors (1).

31043023031 is an equidigital number, since it uses as much as digits as its factorization.

31043023031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31043023031 its reverse (13032034013), we get a palindrome (44075057044).

The spelling of 31043023031 in words is "thirty-one billion, forty-three million, twenty-three thousand, thirty-one".