31108005 has 12 divisors (see below), whose sum is σ = 53920620. Its totient is φ = 16590912.

The previous prime is 31107961. The next prime is 31108013. The reversal of 31108005 is 50080113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17690436 + 13417569 = 4206^2 + 3663^2 .

It is not a de Polignac number, because 31108005 - 2⁹ = 31107493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345600 + ... + 345689.

It is an arithmetic number, because the mean of its divisors is an integer number (4493385).

Almost surely, 2^31108005 is an apocalyptic number.

It is an amenable number.

31108005 is a deficient number, since it is larger than the sum of its proper divisors (22812615).

31108005 is a wasteful number, since it uses less digits than its factorization.

31108005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691300 (or 691297 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 31108005 is about 5577.4550648123. The cubic root of 31108005 is about 314.5024647573.

Adding to 31108005 its reverse (50080113), we get a palindrome (81188118).

The spelling of 31108005 in words is "thirty-one million, one hundred eight thousand, five".