31071040031 has 2 divisors, whose sum is σ = 31071040032. Its totient is φ = 31071040030.

The previous prime is 31071039947. The next prime is 31071040037. The reversal of 31071040031 is 13004017013.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31071040031 - 2¹⁴ = 31071023647 is a prime.

It is a super-2 number, since 2×31071040031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31071039985 and 31071040012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31071040037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15535520015 + 15535520016.

It is an arithmetic number, because the mean of its divisors is an integer number (15535520016).

Almost surely, 2^31071040031 is an apocalyptic number.

31071040031 is a deficient number, since it is larger than the sum of its proper divisors (1).

31071040031 is an equidigital number, since it uses as much as digits as its factorization.

31071040031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

Adding to 31071040031 its reverse (13004017013), we get a palindrome (44075057044).

The spelling of 31071040031 in words is "thirty-one billion, seventy-one million, forty thousand, thirty-one".