243211031040 has 160 divisors (see below), whose sum is σ = 779576086080. Its totient is φ = 64684376064.

The previous prime is 243211031023. The next prime is 243211031053. The reversal of 243211031040 is 40130112342.

It is a tau number, because it is divible by the number of its divisors (160).

It is a junction number, because it is equal to n+sod(n) for n = 243211030998 and 243211031016.

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 15 ways as a sum of consecutive naturals, for example, 2868942 + ... + 2952498.

It is an arithmetic number, because the mean of its divisors is an integer number (4872350538).

Almost surely, 2^243211031040 is an apocalyptic number.

243211031040 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 243211031040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389788043040).

243211031040 is an abundant number, since it is smaller than the sum of its proper divisors (536365055040).

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

243211031040 is an equidigital number, since it uses as much as digits as its factorization.

243211031040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83962 (or 83946 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 243211031040 its reverse (40130112342), we get a palindrome (283341143382).

The spelling of 243211031040 in words is "two hundred forty-three billion, two hundred eleven million, thirty-one thousand, forty".