31664882 has 18 divisors (see below), whose sum is σ = 49940877. Its totient is φ = 15056536.

The previous prime is 31664881. The next prime is 31664891. The reversal of 31664882 is 28846613.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24910081 + 6754801 = 4991^2 + 2599^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3979.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31664881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 182948 + ... + 183120.

Almost surely, 2^31664882 is an apocalyptic number.

31664882 is a deficient number, since it is larger than the sum of its proper divisors (18275995).

31664882 is an equidigital number, since it uses as much as digits as its factorization.

31664882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 198 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 31664882 is about 5627.1557646825. The cubic root of 31664882 is about 316.3680550985.

The spelling of 31664882 in words is "thirty-one million, six hundred sixty-four thousand, eight hundred eighty-two".