243021004 has 6 divisors (see below), whose sum is σ = 425286764. Its totient is φ = 121510500.

The previous prime is 243020927. The next prime is 243021007. The reversal of 243021004 is 400120342.

It is not an unprimeable number, because it can be changed into a prime (243021007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30377622 + ... + 30377629.

Almost surely, 2^243021004 is an apocalyptic number.

It is an amenable number.

243021004 is a deficient number, since it is larger than the sum of its proper divisors (182265760).

243021004 is a wasteful number, since it uses less digits than its factorization.

243021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60755255 (or 60755253 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 243021004 is about 15589.1309571765. The cubic root of 243021004 is about 624.0431258546.

Adding to 243021004 its reverse (400120342), we get a palindrome (643141346).

The spelling of 243021004 in words is "two hundred forty-three million, twenty-one thousand, four".