243201143 has 4 divisors (see below), whose sum is σ = 243346488. Its totient is φ = 243055800.

The previous prime is 243201139. The next prime is 243201157. The reversal of 243201143 is 341102342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243201143 - 2² = 243201139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243201113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70133 + ... + 73518.

It is an arithmetic number, because the mean of its divisors is an integer number (60836622).

Almost surely, 2^243201143 is an apocalyptic number.

243201143 is a deficient number, since it is larger than the sum of its proper divisors (145345).

243201143 is a wasteful number, since it uses less digits than its factorization.

243201143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145344.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 243201143 is about 15594.9075983155. The cubic root of 243201143 is about 624.1972781549.

Adding to 243201143 its reverse (341102342), we get a palindrome (584303485).

It can be divided in two parts, 243201 and 143, that multiplied together give a palindrome (34777743).

The spelling of 243201143 in words is "two hundred forty-three million, two hundred one thousand, one hundred forty-three".