243120353231 has 8 divisors (see below), whose sum is σ = 283763573760. Its totient is φ = 203955068088.

The previous prime is 243120353153. The next prime is 243120353249. The reversal of 243120353231 is 132353021342.

It is a happy number.

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 243120353231 - 2¹⁸ = 243120091087 is a prime.

It is a super-2 number, since 2×243120353231² (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 = 243120353194 and 243120353203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120353251) 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, 369483491 + ... + 369484148.

It is an arithmetic number, because the mean of its divisors is an integer number (35470446720).

Almost surely, 2^243120353231 is an apocalyptic number.

243120353231 is a deficient number, since it is larger than the sum of its proper divisors (40643220529).

243120353231 is an equidigital number, since it uses as much as digits as its factorization.

243120353231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738967693.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 243120353231 its reverse (132353021342), we get a palindrome (375473374573).

The spelling of 243120353231 in words is "two hundred forty-three billion, one hundred twenty million, three hundred fifty-three thousand, two hundred thirty-one".