243331201 has 2 divisors, whose sum is σ = 243331202. Its totient is φ = 243331200.

The previous prime is 243331189. The next prime is 243331219. The reversal of 243331201 is 102133342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207331201 + 36000000 = 14399^2 + 6000^2 .

It is a cyclic number.

It is not a de Polignac number, because 243331201 - 2⁵ = 243331169 is a prime.

It is not a weakly prime, because it can be changed into another prime (243331241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121665600 + 121665601.

It is an arithmetic number, because the mean of its divisors is an integer number (121665601).

Almost surely, 2^243331201 is an apocalyptic number.

It is an amenable number.

243331201 is a deficient number, since it is larger than the sum of its proper divisors (1).

243331201 is an equidigital number, since it uses as much as digits as its factorization.

243331201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 243331201 is about 15599.0769278185. The cubic root of 243331201 is about 624.3085267858.

Adding to 243331201 its reverse (102133342), we get a palindrome (345464543).

The spelling of 243331201 in words is "two hundred forty-three million, three hundred thirty-one thousand, two hundred one".