243100404 has 18 divisors (see below), whose sum is σ = 614503890. Its totient is φ = 81033456.

The previous prime is 243100399. The next prime is 243100427. The reversal of 243100404 is 404001342.

243100404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 175827600 + 67272804 = 13260^2 + 8202^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3376359 + ... + 3376430.

It is an arithmetic number, because the mean of its divisors is an integer number (34139105).

Almost surely, 2^243100404 is an apocalyptic number.

It is an amenable number.

243100404 is an abundant number, since it is smaller than the sum of its proper divisors (371403486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243100404 is a wasteful number, since it uses less digits than its factorization.

243100404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752799 (or 6752794 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 243100404 is about 15591.6773953286. The cubic root of 243100404 is about 624.1110810630. Note that the first 3 decimals are identical.

Adding to 243100404 its reverse (404001342), we get a palindrome (647101746).

The spelling of 243100404 in words is "two hundred forty-three million, one hundred thousand, four hundred four".