243404042 has 16 divisors (see below), whose sum is σ = 418018752. Its totient is φ = 104127360.

The previous prime is 243404039. The next prime is 243404071. The reversal of 243404042 is 240404342.

It is a junction number, because it is equal to n+sod(n) for n = 243403999 and 243404017.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7559 + ... + 23322.

It is an arithmetic number, because the mean of its divisors is an integer number (26126172).

Almost surely, 2^243404042 is an apocalyptic number.

243404042 is a deficient number, since it is larger than the sum of its proper divisors (174614710).

243404042 is a wasteful number, since it uses less digits than its factorization.

243404042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31453.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 243404042 is about 15601.4115387038. The cubic root of 243404042 is about 624.3708159898.

Adding to 243404042 its reverse (240404342), we get a palindrome (483808384).

It can be divided in two parts, 24340 and 4042, that added together give a palindrome (28382).

The spelling of 243404042 in words is "two hundred forty-three million, four hundred four thousand, forty-two".