243203123040 has 96 divisors (see below), whose sum is σ = 774697724640. Its totient is φ = 64125456384.

The previous prime is 243203122999. The next prime is 243203123041. The reversal of 243203123040 is 40321302342.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 243203123040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243203123041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2803759 + ... + 2889198.

It is an arithmetic number, because the mean of its divisors is an integer number (8069767965).

Almost surely, 2^243203123040 is an apocalyptic number.

243203123040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243203123040 is an abundant number, since it is smaller than the sum of its proper divisors (531494601600).

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

243203123040 is a wasteful number, since it uses less digits than its factorization.

243203123040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5693064 (or 5693056 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 243203123040 its reverse (40321302342), we get a palindrome (283524425382).

The spelling of 243203123040 in words is "two hundred forty-three billion, two hundred three million, one hundred twenty-three thousand, forty".