243143444 has 12 divisors (see below), whose sum is σ = 426575604. Its totient is φ = 121264704.

The previous prime is 243143441. The next prime is 243143471. The reversal of 243143444 is 444341342.

It is a happy number.

243143444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 153462544 + 89680900 = 12388^2 + 9470^2 .

It is a super-2 number, since 2×243143444² = 118237468720362272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243143441) 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, 74969 + ... + 78144.

It is an arithmetic number, because the mean of its divisors is an integer number (35547967).

Almost surely, 2^243143444 is an apocalyptic number.

It is an amenable number.

243143444 is a deficient number, since it is larger than the sum of its proper divisors (183432160).

243143444 is a wasteful number, since it uses less digits than its factorization.

243143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153514 (or 153512 counting only the distinct ones).

The product of its digits is 18432, while the sum is 29.

The square root of 243143444 is about 15593.0575577723. The cubic root of 243143444 is about 624.1479110523.

Adding to 243143444 its reverse (444341342), we get a palindrome (687484786).

The spelling of 243143444 in words is "two hundred forty-three million, one hundred forty-three thousand, four hundred forty-four".