321563532072 has 32 divisors (see below), whose sum is σ = 815231494080. Its totient is φ = 105678155520.

The previous prime is 321563532061. The next prime is 321563532119. The reversal of 321563532072 is 270235365123.

It is a super-2 number, since 2×321563532072² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321563532072.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94353793 + ... + 94357200.

It is an arithmetic number, because the mean of its divisors is an integer number (25475984190).

Almost surely, 2^321563532072 is an apocalyptic number.

It is an amenable number.

321563532072 is an abundant number, since it is smaller than the sum of its proper divisors (493667962008).

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

321563532072 is a wasteful number, since it uses less digits than its factorization.

321563532072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188711073 (or 188711069 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 39.

Adding to 321563532072 its reverse (270235365123), we get a palindrome (591798897195).

The spelling of 321563532072 in words is "three hundred twenty-one billion, five hundred sixty-three million, five hundred thirty-two thousand, seventy-two".