243104321 has 8 divisors (see below), whose sum is σ = 245877120. Its totient is φ = 240341008.

The previous prime is 243104311. The next prime is 243104353. The reversal of 243104321 is 123401342.

243104321 = 1454² + 1455² + ... + 1560².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243104321 - 2¹⁴ = 243087937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243104293 and 243104302.

It is not an unprimeable number, because it can be changed into a prime (243104311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57560 + ... + 61638.

It is an arithmetic number, because the mean of its divisors is an integer number (30734640).

Almost surely, 2^243104321 is an apocalyptic number.

It is an amenable number.

243104321 is a deficient number, since it is larger than the sum of its proper divisors (2772799).

243104321 is a wasteful number, since it uses less digits than its factorization.

243104321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 243104321 is about 15591.8030067084. The cubic root of 243104321 is about 624.1144330799.

Adding to 243104321 its reverse (123401342), we get a palindrome (366505663).

The spelling of 243104321 in words is "two hundred forty-three million, one hundred four thousand, three hundred twenty-one".