31080031 has 2 divisors, whose sum is σ = 31080032. Its totient is φ = 31080030.

The previous prime is 31080017. The next prime is 31080041. The reversal of 31080031 is 13008013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31080031 - 2⁵ = 31079999 is a prime.

It is a super-2 number, since 2×31080031² = 1931936653921922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31079987 and 31080014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31080041) 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 as a sum of consecutive naturals, namely, 15540015 + 15540016.

It is an arithmetic number, because the mean of its divisors is an integer number (15540016).

Almost surely, 2^31080031 is an apocalyptic number.

31080031 is a deficient number, since it is larger than the sum of its proper divisors (1).

31080031 is an equidigital number, since it uses as much as digits as its factorization.

31080031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 31080031 is about 5574.9467262029. The cubic root of 31080031 is about 314.4081639447.

Adding to 31080031 its reverse (13008013), we get a palindrome (44088044).

The spelling of 31080031 in words is "thirty-one million, eighty thousand, thirty-one".