243143055 has 24 divisors (see below), whose sum is σ = 425395152. Its totient is φ = 128461824.

The previous prime is 243143053. The next prime is 243143063. The reversal of 243143055 is 550341342.

It is not a de Polignac number, because 243143055 - 2¹ = 243143053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243143053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20434 + ... + 30063.

It is an arithmetic number, because the mean of its divisors is an integer number (17724798).

Almost surely, 2^243143055 is an apocalyptic number.

243143055 is a deficient number, since it is larger than the sum of its proper divisors (182252097).

243143055 is a wasteful number, since it uses less digits than its factorization.

243143055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50615 (or 50612 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 243143055 is about 15593.0450842675. The cubic root of 243143055 is about 624.1475781985.

Adding to 243143055 its reverse (550341342), we get a palindrome (793484397).

The spelling of 243143055 in words is "two hundred forty-three million, one hundred forty-three thousand, fifty-five".