243421143 has 16 divisors (see below), whose sum is σ = 372304896. Its totient is φ = 138581280.

The previous prime is 243421133. The next prime is 243421169. The reversal of 243421143 is 341124342.

It is not a de Polignac number, because 243421143 - 2⁴ = 243421127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243421133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15696 + ... + 27077.

It is an arithmetic number, because the mean of its divisors is an integer number (23269056).

Almost surely, 2^243421143 is an apocalyptic number.

243421143 is a deficient number, since it is larger than the sum of its proper divisors (128883753).

243421143 is a wasteful number, since it uses less digits than its factorization.

243421143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43054.

The product of its digits is 2304, while the sum is 24.

The square root of 243421143 is about 15601.9595884620. The cubic root of 243421143 is about 624.3854379263.

Adding to 243421143 its reverse (341124342), we get a palindrome (584545485).

The spelling of 243421143 in words is "two hundred forty-three million, four hundred twenty-one thousand, one hundred forty-three".