243421240004 has 24 divisors (see below), whose sum is σ = 427099497720. Its totient is φ = 121392912384.

The previous prime is 243421239989. The next prime is 243421240031. The reversal of 243421240004 is 400042124342.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8775942400 + 234645297604 = 93680^2 + 484402^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17192192 + ... + 17206344.

It is an arithmetic number, because the mean of its divisors is an integer number (17795812405).

Almost surely, 2^243421240004 is an apocalyptic number.

It is an amenable number.

243421240004 is a deficient number, since it is larger than the sum of its proper divisors (183678257716).

243421240004 is a wasteful number, since it uses less digits than its factorization.

243421240004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25079 (or 25077 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 243421240004 its reverse (400042124342), we get a palindrome (643463364346).

The spelling of 243421240004 in words is "two hundred forty-three billion, four hundred twenty-one million, two hundred forty thousand, four".