243512055 has 32 divisors (see below), whose sum is σ = 434116800. Its totient is φ = 129511296.

The previous prime is 243512047. The next prime is 243512083. The reversal of 243512055 is 550215342.

It is a happy number.

It is not a de Polignac number, because 243512055 - 2³ = 243512047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50197 + ... + 54833.

It is an arithmetic number, because the mean of its divisors is an integer number (13566150).

Almost surely, 2^243512055 is an apocalyptic number.

243512055 is a deficient number, since it is larger than the sum of its proper divisors (190604745).

243512055 is a wasteful number, since it uses less digits than its factorization.

243512055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040 (or 5034 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 243512055 is about 15604.8727966619. The cubic root of 243512055 is about 624.4631592820.

Adding to 243512055 its reverse (550215342), we get a palindrome (793727397).

The spelling of 243512055 in words is "two hundred forty-three million, five hundred twelve thousand, fifty-five".