243031232240 has 40 divisors (see below), whose sum is σ = 565277860080. Its totient is φ = 97172880896.

The previous prime is 243031232183. The next prime is 243031232261. The reversal of 243031232240 is 42232130342.

243031232240 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 an unprimeable number.

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, 420989 + ... + 814428.

It is an arithmetic number, because the mean of its divisors is an integer number (14131946502).

Almost surely, 2^243031232240 is an apocalyptic number.

243031232240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243031232240 is an abundant number, since it is smaller than the sum of its proper divisors (322246627840).

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

243031232240 is a wasteful number, since it uses less digits than its factorization.

243031232240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237889 (or 1237883 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 243031232240 its reverse (42232130342), we get a palindrome (285263362582).

The spelling of 243031232240 in words is "two hundred forty-three billion, thirty-one million, two hundred thirty-two thousand, two hundred forty".