243115030255 has 4 divisors (see below), whose sum is σ = 291738036312. Its totient is φ = 194492024200.

The previous prime is 243115030243. The next prime is 243115030273. The reversal of 243115030255 is 552030511342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552030511342 = 2 ⋅276015255671.

It is not a de Polignac number, because 243115030255 - 2⁷ = 243115030127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24311503021 + ... + 24311503030.

It is an arithmetic number, because the mean of its divisors is an integer number (72934509078).

Almost surely, 2^243115030255 is an apocalyptic number.

243115030255 is a deficient number, since it is larger than the sum of its proper divisors (48623006057).

243115030255 is an equidigital number, since it uses as much as digits as its factorization.

243115030255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48623006056.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 243115030255 its reverse (552030511342), we get a palindrome (795145541597).

The spelling of 243115030255 in words is "two hundred forty-three billion, one hundred fifteen million, thirty thousand, two hundred fifty-five".