31947223508 has 12 divisors (see below), whose sum is σ = 56019684000. Its totient is φ = 15941599512.

The previous prime is 31947223433. The next prime is 31947223519. The reversal of 31947223508 is 80532274913.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8000816 + ... + 8004807.

It is an arithmetic number, because the mean of its divisors is an integer number (4668307000).

Almost surely, 2^31947223508 is an apocalyptic number.

It is an amenable number.

31947223508 is a deficient number, since it is larger than the sum of its proper divisors (24072460492).

31947223508 is a wasteful number, since it uses less digits than its factorization.

31947223508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16006126 (or 16006124 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 31947223508 in words is "thirty-one billion, nine hundred forty-seven million, two hundred twenty-three thousand, five hundred eight".