31118085 has 24 divisors (see below), whose sum is σ = 54501720. Its totient is φ = 16422912.

The previous prime is 31118077. The next prime is 31118099. The reversal of 31118085 is 58081113.

It can be written as a sum of positive squares in 4 ways, for example, as 3932289 + 27185796 = 1983^2 + 5214^2 .

It is not a de Polignac number, because 31118085 - 2³ = 31118077 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 801 + ... + 7929.

It is an arithmetic number, because the mean of its divisors is an integer number (2270905).

Almost surely, 2^31118085 is an apocalyptic number.

It is an amenable number.

31118085 is a deficient number, since it is larger than the sum of its proper divisors (23383635).

31118085 is a wasteful number, since it uses less digits than its factorization.

31118085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7237 (or 7234 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 31118085 is about 5578.3586295612. The cubic root of 31118085 is about 314.5364307465.

Adding to 31118085 its reverse (58081113), we get a palindrome (89199198).

The spelling of 31118085 in words is "thirty-one million, one hundred eighteen thousand, eighty-five".