31871064 has 32 divisors (see below), whose sum is σ = 80176320. Its totient is φ = 10557216.

The previous prime is 31871053. The next prime is 31871083. The reversal of 31871064 is 46017813.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 162 + ... + 7985.

It is an arithmetic number, because the mean of its divisors is an integer number (2505510).

Almost surely, 2^31871064 is an apocalyptic number.

It is an amenable number.

31871064 is an abundant number, since it is smaller than the sum of its proper divisors (48305256).

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

31871064 is a wasteful number, since it uses less digits than its factorization.

31871064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8319 (or 8315 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 31871064 is about 5645.4463065377. The cubic root of 31871064 is about 317.0532340351.

Adding to 31871064 its reverse (46017813), we get a palindrome (77888877).

The spelling of 31871064 in words is "thirty-one million, eight hundred seventy-one thousand, sixty-four".