243220122340 has 192 divisors, whose sum is σ = 610894255104. Its totient is φ = 80485097472.

The previous prime is 243220122329. The next prime is 243220122347. The reversal of 243220122340 is 43221022342.

243220122340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243220122340² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243220122347) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7670559 + ... + 7702201.

It is an arithmetic number, because the mean of its divisors is an integer number (3181740912).

Almost surely, 2^243220122340 is an apocalyptic number.

243220122340 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 243220122340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305447127552).

243220122340 is an abundant number, since it is smaller than the sum of its proper divisors (367674132764).

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

243220122340 is a wasteful number, since it uses less digits than its factorization.

243220122340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31766 (or 31764 counting only the distinct ones).

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

Adding to 243220122340 its reverse (43221022342), we get a palindrome (286441144682).

The spelling of 243220122340 in words is "two hundred forty-three billion, two hundred twenty million, one hundred twenty-two thousand, three hundred forty".