31743172 has 12 divisors (see below), whose sum is σ = 55710396. Its totient is φ = 15825920.

The previous prime is 31743161. The next prime is 31743181. The reversal of 31743172 is 27134713.

It can be written as a sum of positive squares in 2 ways, for example, as 5875776 + 25867396 = 2424^2 + 5086^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31743172.

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, 9829 + ... + 12652.

It is an arithmetic number, because the mean of its divisors is an integer number (4642533).

Almost surely, 2^31743172 is an apocalyptic number.

It is an amenable number.

31743172 is a deficient number, since it is larger than the sum of its proper divisors (23967224).

31743172 is a wasteful number, since it uses less digits than its factorization.

31743172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22838 (or 22836 counting only the distinct ones).

The product of its digits is 3528, while the sum is 28.

The square root of 31743172 is about 5634.1079151894. The cubic root of 31743172 is about 316.6285757815.

Adding to 31743172 its reverse (27134713), we get a palindrome (58877885).

The spelling of 31743172 in words is "thirty-one million, seven hundred forty-three thousand, one hundred seventy-two".