243430556 has 12 divisors (see below), whose sum is σ = 428555568. Its totient is φ = 120986112.

The previous prime is 243430543. The next prime is 243430559. The reversal of 243430556 is 655034342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243430559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181541 + ... + 182876.

It is an arithmetic number, because the mean of its divisors is an integer number (35712964).

Almost surely, 2^243430556 is an apocalyptic number.

It is an amenable number.

243430556 is a deficient number, since it is larger than the sum of its proper divisors (185125012).

243430556 is a wasteful number, since it uses less digits than its factorization.

243430556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364588 (or 364586 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 243430556 is about 15602.2612463707. The cubic root of 243430556 is about 624.3934860691.

Adding to 243430556 its reverse (655034342), we get a palindrome (898464898).

The spelling of 243430556 in words is "two hundred forty-three million, four hundred thirty thousand, five hundred fifty-six".