31671042 has 32 divisors (see below), whose sum is σ = 68691840. Its totient is φ = 9676800.

The previous prime is 31671019. The next prime is 31671053. The reversal of 31671042 is 24017613.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10434 + ... + 13122.

It is an arithmetic number, because the mean of its divisors is an integer number (2146620).

Almost surely, 2^31671042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31671042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34345920).

31671042 is an abundant number, since it is smaller than the sum of its proper divisors (37020798).

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

31671042 is a wasteful number, since it uses less digits than its factorization.

31671042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 31671042 is about 5627.7030838522. The cubic root of 31671042 is about 316.3885688952.

Adding to 31671042 its reverse (24017613), we get a palindrome (55688655).

The spelling of 31671042 in words is "thirty-one million, six hundred seventy-one thousand, forty-two".