243342400203 has 40 divisors (see below), whose sum is σ = 415956008160. Its totient is φ = 138880656000.

The previous prime is 243342400187. The next prime is 243342400237. The reversal of 243342400203 is 302004243342.

243342400203 is a `hidden beast` number, since 2 + 4 + 33 + 424 + 0 + 0 + 203 = 666.

243342400203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243342400203 - 2⁴ = 243342400187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (243342400403) 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 39 ways as a sum of consecutive naturals, for example, 193453 + ... + 723953.

It is an arithmetic number, because the mean of its divisors is an integer number (10398900204).

Almost surely, 2^243342400203 is an apocalyptic number.

243342400203 is a deficient number, since it is larger than the sum of its proper divisors (172613607957).

243342400203 is an equidigital number, since it uses as much as digits as its factorization.

243342400203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531329 (or 531320 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 243342400203 its reverse (302004243342), we get a palindrome (545346643545).

It can be divided in two parts, 243342 and 400203, that added together give a triangular number (643545 = T₁₁₃₄).

The spelling of 243342400203 in words is "two hundred forty-three billion, three hundred forty-two million, four hundred thousand, two hundred three".