31044031 has 2 divisors, whose sum is σ = 31044032. Its totient is φ = 31044030.

The previous prime is 31044029. The next prime is 31044049. The reversal of 31044031 is 13044013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31044031 - 2¹ = 31044029 is a prime.

It is a super-2 number, since 2×31044031² = 1927463721457922, which contains 22 as substring.

Together with 31044029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 31043996 and 31044014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31044631) 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, 15522015 + 15522016.

It is an arithmetic number, because the mean of its divisors is an integer number (15522016).

Almost surely, 2^31044031 is an apocalyptic number.

31044031 is a deficient number, since it is larger than the sum of its proper divisors (1).

31044031 is an equidigital number, since it uses as much as digits as its factorization.

31044031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31044031 is about 5571.7170602966. The cubic root of 31044031 is about 314.2867240522.

Adding to 31044031 its reverse (13044013), we get a palindrome (44088044).

The spelling of 31044031 in words is "thirty-one million, forty-four thousand, thirty-one".