232221032440 has 64 divisors (see below), whose sum is σ = 537039590400. Its totient is φ = 90307058688.

The previous prime is 232221032429. The next prime is 232221032489. The reversal of 232221032440 is 44230122232.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1846857 + ... + 1968583.

It is an arithmetic number, because the mean of its divisors is an integer number (8391243600).

Almost surely, 2^232221032440 is an apocalyptic number.

232221032440 is a gapful number since it is divisible by the number (20) 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 232221032440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268519795200).

232221032440 is an abundant number, since it is smaller than the sum of its proper divisors (304818557960).

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

232221032440 is a wasteful number, since it uses less digits than its factorization.

232221032440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123064 (or 123060 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 232221032440 its reverse (44230122232), we get a palindrome (276451154672).

The spelling of 232221032440 in words is "two hundred thirty-two billion, two hundred twenty-one million, thirty-two thousand, four hundred forty".