243301505231 has 8 divisors (see below), whose sum is σ = 246426259200. Its totient is φ = 240177876120.

The previous prime is 243301505159. The next prime is 243301505257. The reversal of 243301505231 is 132505103342.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-243301505231 is a prime.

It is a super-2 number, since 2×243301505231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243301505194 and 243301505203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243301505281) 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, 158540 + ... + 715358.

It is an arithmetic number, because the mean of its divisors is an integer number (30803282400).

Almost surely, 2^243301505231 is an apocalyptic number.

243301505231 is a deficient number, since it is larger than the sum of its proper divisors (3124753969).

243301505231 is an equidigital number, since it uses as much as digits as its factorization.

243301505231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562429.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 243301505231 its reverse (132505103342), we get a palindrome (375806608573).

The spelling of 243301505231 in words is "two hundred forty-three billion, three hundred one million, five hundred five thousand, two hundred thirty-one".