243421242003 has 24 divisors (see below), whose sum is σ = 367112517408. Its totient is φ = 155133445632.

The previous prime is 243421241989. The next prime is 243421242037. The reversal of 243421242003 is 300242124342.

243421242003 is a `hidden beast` number, since 2 + 434 + 2 + 1 + 24 + 200 + 3 = 666.

It is not a de Polignac number, because 243421242003 - 2¹⁸ = 243420979859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243421242503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4801 + ... + 697757.

It is an arithmetic number, because the mean of its divisors is an integer number (15296354892).

Almost surely, 2^243421242003 is an apocalyptic number.

243421242003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

243421242003 is a deficient number, since it is larger than the sum of its proper divisors (123691275405).

243421242003 is a wasteful number, since it uses less digits than its factorization.

243421242003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694683 (or 694680 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 243421242003 its reverse (300242124342), we get a palindrome (543663366345).

The spelling of 243421242003 in words is "two hundred forty-three billion, four hundred twenty-one million, two hundred forty-two thousand, three".