31672016 has 20 divisors (see below), whose sum is σ = 61500900. Its totient is φ = 15800832.

The previous prime is 31672009. The next prime is 31672027. The reversal of 31672016 is 61027613.

It can be written as a sum of positive squares in 2 ways, for example, as 24403600 + 7268416 = 4940^2 + 2696^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6200 + ... + 10088.

It is an arithmetic number, because the mean of its divisors is an integer number (3075045).

Almost surely, 2^31672016 is an apocalyptic number.

It is an amenable number.

31672016 is a deficient number, since it is larger than the sum of its proper divisors (29828884).

31672016 is a wasteful number, since it uses less digits than its factorization.

31672016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4406 (or 4400 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 31672016 is about 5627.7896193799. The cubic root of 31672016 is about 316.3918122293.

Adding to 31672016 its reverse (61027613), we get a palindrome (92699629).

The spelling of 31672016 in words is "thirty-one million, six hundred seventy-two thousand, sixteen".