243043442 has 4 divisors (see below), whose sum is σ = 364565166. Its totient is φ = 121521720.

The previous prime is 243043433. The next prime is 243043447. The reversal of 243043442 is 244340342.

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

It can be written as a sum of positive squares in only one way, i.e., 146434201 + 96609241 = 12101^2 + 9829^2 .

It is a super-2 number, since 2×243043442² = 118140229398414728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243043447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60760859 + ... + 60760862.

Almost surely, 2^243043442 is an apocalyptic number.

243043442 is a deficient number, since it is larger than the sum of its proper divisors (121521724).

243043442 is a wasteful number, since it uses less digits than its factorization.

243043442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121521723.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 243043442 is about 15589.8506086492. The cubic root of 243043442 is about 624.0623311202.

Adding to 243043442 its reverse (244340342), we get a palindrome (487383784).

The spelling of 243043442 in words is "two hundred forty-three million, forty-three thousand, four hundred forty-two".