321161223432 has 64 divisors (see below), whose sum is σ = 931299102720. Its totient is φ = 90390788928.

The previous prime is 321161223413. The next prime is 321161223433. The reversal of 321161223432 is 234322161123.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 321161223432.

It is not an unprimeable number, because it can be changed into a prime (321161223433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14254968 + ... + 14277479.

It is an arithmetic number, because the mean of its divisors is an integer number (14551548480).

Almost surely, 2^321161223432 is an apocalyptic number.

It is an amenable number.

321161223432 is an abundant number, since it is smaller than the sum of its proper divisors (610137879288).

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

321161223432 is a wasteful number, since it uses less digits than its factorization.

321161223432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28532530 (or 28532526 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

Adding to 321161223432 its reverse (234322161123), we get a palindrome (555483384555).

The spelling of 321161223432 in words is "three hundred twenty-one billion, one hundred sixty-one million, two hundred twenty-three thousand, four hundred thirty-two".