31940871 has 8 divisors (see below), whose sum is σ = 43494144. Its totient is φ = 20840760.

The previous prime is 31940837. The next prime is 31940899. The reversal of 31940871 is 17804913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31940871 - 2¹³ = 31932679 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31940801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113125 + ... + 113406.

It is an arithmetic number, because the mean of its divisors is an integer number (5436768).

Almost surely, 2^31940871 is an apocalyptic number.

31940871 is a deficient number, since it is larger than the sum of its proper divisors (11553273).

31940871 is a wasteful number, since it uses less digits than its factorization.

31940871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226581.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 31940871 is about 5651.6255183796. The cubic root of 31940871 is about 317.2845451686.

The spelling of 31940871 in words is "thirty-one million, nine hundred forty thousand, eight hundred seventy-one".