243311200240 has 80 divisors (see below), whose sum is σ = 567563673600. Its totient is φ = 97004134656.

The previous prime is 243311200219. The next prime is 243311200241. The reversal of 243311200240 is 42002113342.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243311200241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34562641 + ... + 34569679.

It is an arithmetic number, because the mean of its divisors is an integer number (7094545920).

Almost surely, 2^243311200240 is an apocalyptic number.

243311200240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243311200240 is an abundant number, since it is smaller than the sum of its proper divisors (324252473360).

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

243311200240 is a wasteful number, since it uses less digits than its factorization.

243311200240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8414 (or 8408 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 243311200240 its reverse (42002113342), we get a palindrome (285313313582).

The spelling of 243311200240 in words is "two hundred forty-three billion, three hundred eleven million, two hundred thousand, two hundred forty".