243421322240 has 88 divisors (see below), whose sum is σ = 591318363840. Its totient is φ = 96135856128.

The previous prime is 243421322237. The next prime is 243421322267. The reversal of 243421322240 is 42223124342.

It is a congruent number.

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, 103574 + ... + 705386.

Almost surely, 2^243421322240 is an apocalyptic number.

243421322240 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 243421322240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295659181920).

243421322240 is an abundant number, since it is smaller than the sum of its proper divisors (347897041600).

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

243421322240 is an equidigital number, since it uses as much as digits as its factorization.

243421322240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601917 (or 601899 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 243421322240 its reverse (42223124342), we get a palindrome (285644446582).

The spelling of 243421322240 in words is "two hundred forty-three billion, four hundred twenty-one million, three hundred twenty-two thousand, two hundred forty".