31641164 has 12 divisors (see below), whose sum is σ = 55437144. Its totient is φ = 15801984.

The previous prime is 31641157. The next prime is 31641187. The reversal of 31641164 is 46114613.

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 3 ways as a sum of consecutive naturals, for example, 389 + ... + 7964.

It is an arithmetic number, because the mean of its divisors is an integer number (4619762).

Almost surely, 2^31641164 is an apocalyptic number.

It is an amenable number.

31641164 is a deficient number, since it is larger than the sum of its proper divisors (23795980).

31641164 is a wasteful number, since it uses less digits than its factorization.

31641164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9304 (or 9302 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 31641164 is about 5625.0479109071. The cubic root of 31641164 is about 316.2890454689.

Adding to 31641164 its reverse (46114613), we get a palindrome (77755777).

The spelling of 31641164 in words is "thirty-one million, six hundred forty-one thousand, one hundred sixty-four".