31716172 has 24 divisors (see below), whose sum is σ = 58496256. Its totient is φ = 15016848.

The previous prime is 31716163. The next prime is 31716221. The reversal of 31716172 is 27161713.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 31716172.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7803 + ... + 11149.

It is an arithmetic number, because the mean of its divisors is an integer number (2437344).

Almost surely, 2^31716172 is an apocalyptic number.

It is an amenable number.

31716172 is a deficient number, since it is larger than the sum of its proper divisors (26780084).

31716172 is a wasteful number, since it uses less digits than its factorization.

31716172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477 (or 3475 counting only the distinct ones).

The product of its digits is 1764, while the sum is 28.

The square root of 31716172 is about 5631.7112852134. The cubic root of 31716172 is about 316.5387780287.

Adding to 31716172 its reverse (27161713), we get a palindrome (58877885).

The spelling of 31716172 in words is "thirty-one million, seven hundred sixteen thousand, one hundred seventy-two".