243031312240 has 40 divisors (see below), whose sum is σ = 567299034288. Its totient is φ = 96825216000.

The previous prime is 243031312213. The next prime is 243031312241. The reversal of 243031312240 is 42213130342.

243031312240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243031312241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6031497 + ... + 6071656.

Almost surely, 2^243031312240 is an apocalyptic number.

243031312240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243031312240 is an abundant number, since it is smaller than the sum of its proper divisors (324267722048).

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

243031312240 is a wasteful number, since it uses less digits than its factorization.

243031312240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12103417 (or 12103411 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 243031312240 its reverse (42213130342), we get a palindrome (285244442582).

The spelling of 243031312240 in words is "two hundred forty-three billion, thirty-one million, three hundred twelve thousand, two hundred forty".