243201230251 has 32 divisors (see below), whose sum is σ = 295658398080. Its totient is φ = 195825168000.

The previous prime is 243201230203. The next prime is 243201230323. The reversal of 243201230251 is 152032102342.

It is not a de Polignac number, because 243201230251 - 2¹⁹ = 243200705963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243201236251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6297501 + ... + 6336001.

It is an arithmetic number, because the mean of its divisors is an integer number (9239324940).

Almost surely, 2^243201230251 is an apocalyptic number.

243201230251 is a deficient number, since it is larger than the sum of its proper divisors (52457167829).

243201230251 is an frugal number, since it uses more digits than its factorization.

243201230251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38632 (or 38574 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 243201230251 its reverse (152032102342), we get a palindrome (395233332593).

The spelling of 243201230251 in words is "two hundred forty-three billion, two hundred one million, two hundred thirty thousand, two hundred fifty-one".