31041613 has 2 divisors, whose sum is σ = 31041614. Its totient is φ = 31041612.

The previous prime is 31041599. The next prime is 31041733. The reversal of 31041613 is 31614013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21325924 + 9715689 = 4618^2 + 3117^2 .

It is a cyclic number.

It is not a de Polignac number, because 31041613 - 2⁵ = 31041581 is a prime.

It is a super-3 number, since 3×31041613³ (a number of 23 digits) contains 333 as substring.

It is the 5572-nd Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31047613) by changing a digit.

It is a nontrivial repunit in base 5571.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15520806 + 15520807.

It is an arithmetic number, because the mean of its divisors is an integer number (15520807).

Almost surely, 2^31041613 is an apocalyptic number.

It is an amenable number.

31041613 is a deficient number, since it is larger than the sum of its proper divisors (1).

31041613 is an equidigital number, since it uses as much as digits as its factorization.

31041613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31041613 is about 5571.5000673068. The cubic root of 31041613 is about 314.2785639755.

Adding to 31041613 its reverse (31614013), we get a palindrome (62655626).

The spelling of 31041613 in words is "thirty-one million, forty-one thousand, six hundred thirteen".