31652447871 has 48 divisors (see below), whose sum is σ = 48975556608. Its totient is φ = 18029692800.

The previous prime is 31652447867. The next prime is 31652447881. The reversal of 31652447871 is 17874425613.

It is not a de Polignac number, because 31652447871 - 2² = 31652447867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31652447871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31652447881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1502491 + ... + 1523411.

It is an arithmetic number, because the mean of its divisors is an integer number (1020324096).

Almost surely, 2^31652447871 is an apocalyptic number.

31652447871 is a deficient number, since it is larger than the sum of its proper divisors (17323108737).

31652447871 is a wasteful number, since it uses less digits than its factorization.

31652447871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21100 (or 21081 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The spelling of 31652447871 in words is "thirty-one billion, six hundred fifty-two million, four hundred forty-seven thousand, eight hundred seventy-one".