31543443532 has 12 divisors (see below), whose sum is σ = 55203668856. Its totient is φ = 15770966720.

The previous prime is 31543443499. The next prime is 31543443539. The reversal of 31543443532 is 23534434513.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31543443491 and 31543443500.

It is not an unprimeable number, because it can be changed into a prime (31543443539) 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 3 ways as a sum of consecutive naturals, for example, 88894 + ... + 266437.

It is an arithmetic number, because the mean of its divisors is an integer number (4600305738).

Almost surely, 2^31543443532 is an apocalyptic number.

It is an amenable number.

31543443532 is a deficient number, since it is larger than the sum of its proper divisors (23660225324).

31543443532 is a wasteful number, since it uses less digits than its factorization.

31543443532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377528 (or 377526 counting only the distinct ones).

The product of its digits is 259200, while the sum is 37.

The spelling of 31543443532 in words is "thirty-one billion, five hundred forty-three million, four hundred forty-three thousand, five hundred thirty-two".