243421325251 has 8 divisors (see below), whose sum is σ = 267723618624. Its totient is φ = 219915828480.

The previous prime is 243421325201. The next prime is 243421325297. The reversal of 243421325251 is 152523124342.

243421325251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243421325251 - 2¹¹ = 243421323203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243421325201) 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 7 ways as a sum of consecutive naturals, for example, 199198510 + ... + 199199731.

It is an arithmetic number, because the mean of its divisors is an integer number (33465452328).

Almost surely, 2^243421325251 is an apocalyptic number.

243421325251 is a deficient number, since it is larger than the sum of its proper divisors (24302293373).

243421325251 is a wasteful number, since it uses less digits than its factorization.

243421325251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398398301.

The product of its digits is 57600, while the sum is 34.

Adding to 243421325251 its reverse (152523124342), we get a palindrome (395944449593).

The spelling of 243421325251 in words is "two hundred forty-three billion, four hundred twenty-one million, three hundred twenty-five thousand, two hundred fifty-one".