31190085 has 24 divisors (see below), whose sum is σ = 54213120. Its totient is φ = 16588512.

The previous prime is 31190063. The next prime is 31190099. The reversal of 31190085 is 58009113.

It is not a de Polignac number, because 31190085 - 2⁷ = 31189957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20832 + ... + 22278.

It is an arithmetic number, because the mean of its divisors is an integer number (2258880).

Almost surely, 2^31190085 is an apocalyptic number.

It is an amenable number.

31190085 is a deficient number, since it is larger than the sum of its proper divisors (23023035).

31190085 is a wasteful number, since it uses less digits than its factorization.

31190085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937 (or 1934 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 31190085 is about 5584.8084121123. The cubic root of 31190085 is about 314.7788319000.

Adding to 31190085 its reverse (58009113), we get a palindrome (89199198).

The spelling of 31190085 in words is "thirty-one million, one hundred ninety thousand, eighty-five".