243421452251 has 8 divisors (see below), whose sum is σ = 243968601600. Its totient is φ = 242874396072.

The previous prime is 243421452247. The next prime is 243421452331. The reversal of 243421452251 is 152254124342.

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 243421452251 - 2² = 243421452247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243421452851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9524576 + ... + 9550098.

It is an arithmetic number, because the mean of its divisors is an integer number (30496075200).

Almost surely, 2^243421452251 is an apocalyptic number.

243421452251 is a deficient number, since it is larger than the sum of its proper divisors (547149349).

243421452251 is a wasteful number, since it uses less digits than its factorization.

243421452251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46585.

The product of its digits is 76800, while the sum is 35.

Adding to 243421452251 its reverse (152254124342), we get a palindrome (395675576593).

The spelling of 243421452251 in words is "two hundred forty-three billion, four hundred twenty-one million, four hundred fifty-two thousand, two hundred fifty-one".