31634985 has 16 divisors (see below), whose sum is σ = 51851520. Its totient is φ = 16460160.

The previous prime is 31634983. The next prime is 31634989. The reversal of 31634985 is 58943613.

It is not a de Polignac number, because 31634985 - 2¹ = 31634983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31634983) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 25105 + ... + 26334.

It is an arithmetic number, because the mean of its divisors is an integer number (3240720).

Almost surely, 2^31634985 is an apocalyptic number.

It is an amenable number.

31634985 is a deficient number, since it is larger than the sum of its proper divisors (20216535).

31634985 is a wasteful number, since it uses less digits than its factorization.

31634985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51488.

The product of its digits is 77760, while the sum is 39.

The square root of 31634985 is about 5624.4986443238. The cubic root of 31634985 is about 316.2684554421.

The spelling of 31634985 in words is "thirty-one million, six hundred thirty-four thousand, nine hundred eighty-five".