243421201 has 8 divisors (see below), whose sum is σ = 247049000. Its totient is φ = 239801472.

The previous prime is 243421193. The next prime is 243421247. The reversal of 243421201 is 102124342.

It can be written as a sum of positive squares in 4 ways, for example, as 1587600 + 241833601 = 1260^2 + 15551^2 .

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 243421201 - 2³ = 243421193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243421271) 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, 87175 + ... + 89923.

It is an arithmetic number, because the mean of its divisors is an integer number (30881125).

Almost surely, 2^243421201 is an apocalyptic number.

It is an amenable number.

243421201 is a deficient number, since it is larger than the sum of its proper divisors (3627799).

243421201 is a wasteful number, since it uses less digits than its factorization.

243421201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 243421201 is about 15601.9614472027. The cubic root of 243421201 is about 624.3854875171.

Adding to 243421201 its reverse (102124342), we get a palindrome (345545543).

The spelling of 243421201 in words is "two hundred forty-three million, four hundred twenty-one thousand, two hundred one".