31671112 has 64 divisors (see below), whose sum is σ = 67962240. Its totient is φ = 13708800.

The previous prime is 31671089. The next prime is 31671121. The reversal of 31671112 is 21117613.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 231108 + ... + 231244.

It is an arithmetic number, because the mean of its divisors is an integer number (1061910).

Almost surely, 2^31671112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31671112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33981120).

31671112 is an abundant number, since it is smaller than the sum of its proper divisors (36291128).

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

31671112 is a wasteful number, since it uses less digits than its factorization.

31671112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 258 counting only the distinct ones).

The product of its digits is 252, while the sum is 22.

The square root of 31671112 is about 5627.7093030824. The cubic root of 31671112 is about 316.3888019913.

Adding to 31671112 its reverse (21117613), we get a palindrome (52788725).

The spelling of 31671112 in words is "thirty-one million, six hundred seventy-one thousand, one hundred twelve".