243012440220 has 96 divisors (see below), whose sum is σ = 743390355456. Its totient is φ = 58824979200.

The previous prime is 243012440179. The next prime is 243012440263. The reversal of 243012440220 is 22044210342.

It is a super-3 number, since 3×243012440220³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174885 + ... + 718755.

It is an arithmetic number, because the mean of its divisors is an integer number (7743649536).

Almost surely, 2^243012440220 is an apocalyptic number.

243012440220 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 243012440220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371695177728).

243012440220 is an abundant number, since it is smaller than the sum of its proper divisors (500377915236).

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

243012440220 is a wasteful number, since it uses less digits than its factorization.

243012440220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544571 (or 544569 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 243012440220 its reverse (22044210342), we get a palindrome (265056650562).

The spelling of 243012440220 in words is "two hundred forty-three billion, twelve million, four hundred forty thousand, two hundred twenty".