243321404 has 12 divisors (see below), whose sum is σ = 427035000. Its totient is φ = 121311408.

The previous prime is 243321401. The next prime is 243321409. The reversal of 243321404 is 404123342.

It is a self number, because there is not a number n which added to its sum of digits gives 243321404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243321401) 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, 85754 + ... + 88545.

It is an arithmetic number, because the mean of its divisors is an integer number (35586250).

Almost surely, 2^243321404 is an apocalyptic number.

It is an amenable number.

243321404 is a deficient number, since it is larger than the sum of its proper divisors (183713596).

243321404 is a wasteful number, since it uses less digits than its factorization.

243321404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174652 (or 174650 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 243321404 is about 15598.7628996661. The cubic root of 243321404 is about 624.3001480374.

Adding to 243321404 its reverse (404123342), we get a palindrome (647444746).

The spelling of 243321404 in words is "two hundred forty-three million, three hundred twenty-one thousand, four hundred four".