31996165 has 8 divisors (see below), whose sum is σ = 38430720. Its totient is φ = 25573392.

The previous prime is 31996163. The next prime is 31996169. The reversal of 31996165 is 56169913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31996165 - 2¹ = 31996163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31996163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4972 + ... + 9418.

It is an arithmetic number, because the mean of its divisors is an integer number (4803840).

Almost surely, 2^31996165 is an apocalyptic number.

It is an amenable number.

31996165 is a deficient number, since it is larger than the sum of its proper divisors (6434555).

31996165 is a wasteful number, since it uses less digits than its factorization.

31996165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5891.

The product of its digits is 43740, while the sum is 40.

The square root of 31996165 is about 5656.5152700227. The cubic root of 31996165 is about 317.4675272140.

The spelling of 31996165 in words is "thirty-one million, nine hundred ninety-six thousand, one hundred sixty-five".