321231232 has 64 divisors (see below), whose sum is σ = 742429440. Its totient is φ = 135590400.

The previous prime is 321231221. The next prime is 321231329. The reversal of 321231232 is 232132123.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57357 + ... + 62707.

It is an arithmetic number, because the mean of its divisors is an integer number (11600460).

Almost surely, 2^321231232 is an apocalyptic number.

321231232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371214720).

321231232 is an abundant number, since it is smaller than the sum of its proper divisors (421198208).

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

321231232 is an equidigital number, since it uses as much as digits as its factorization.

321231232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439 (or 5427 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 321231232 is about 17922.9247613217. The cubic root of 321231232 is about 684.8664964397.

Adding to 321231232 its reverse (232132123), we get a palindrome (553363355).

The spelling of 321231232 in words is "three hundred twenty-one million, two hundred thirty-one thousand, two hundred thirty-two".