31545533216 has 48 divisors (see below), whose sum is σ = 63373661568. Its totient is φ = 15453504000.

The previous prime is 31545533197. The next prime is 31545533219. The reversal of 31545533216 is 61233554513.

It is a self number, because there is not a number n which added to its sum of digits gives 31545533216.

It is not an unprimeable number, because it can be changed into a prime (31545533219) 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, 308021 + ... + 397451.

It is an arithmetic number, because the mean of its divisors is an integer number (1320284616).

Almost surely, 2^31545533216 is an apocalyptic number.

It is an amenable number.

31545533216 is an abundant number, since it is smaller than the sum of its proper divisors (31828128352).

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

31545533216 is a wasteful number, since it uses less digits than its factorization.

31545533216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89665 (or 89657 counting only the distinct ones).

The product of its digits is 162000, while the sum is 38.

The spelling of 31545533216 in words is "thirty-one billion, five hundred forty-five million, five hundred thirty-three thousand, two hundred sixteen".