31608132 has 12 divisors (see below), whose sum is σ = 73752336. Its totient is φ = 10536040.

The previous prime is 31608131. The next prime is 31608133. The reversal of 31608132 is 23180613.

It is an interprime number because it is at equal distance from previous prime (31608131) and next prime (31608133).

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (31608131) 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 3 ways as a sum of consecutive naturals, for example, 1316994 + ... + 1317017.

It is an arithmetic number, because the mean of its divisors is an integer number (6146028).

Almost surely, 2^31608132 is an apocalyptic number.

It is an amenable number.

31608132 is an abundant number, since it is smaller than the sum of its proper divisors (42144204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31608132 is a wasteful number, since it uses less digits than its factorization.

31608132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634018 (or 2634016 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 31608132 is about 5622.1109914337. The cubic root of 31608132 is about 316.1789431404.

Adding to 31608132 its reverse (23180613), we get a palindrome (54788745).

The spelling of 31608132 in words is "thirty-one million, six hundred eight thousand, one hundred thirty-two".