243533201 has 4 divisors (see below), whose sum is σ = 243745572. Its totient is φ = 243320832.

The previous prime is 243533197. The next prime is 243533237. The reversal of 243533201 is 102335342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 179533201 + 64000000 = 13399^2 + 8000^2 .

It is a cyclic number.

It is not a de Polignac number, because 243533201 - 2² = 243533197 is a prime.

It is a super-3 number, since 3×243533201³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243233201) 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, 104456 + ... + 106761.

It is an arithmetic number, because the mean of its divisors is an integer number (60936393).

Almost surely, 2^243533201 is an apocalyptic number.

It is an amenable number.

243533201 is a deficient number, since it is larger than the sum of its proper divisors (212371).

243533201 is a wasteful number, since it uses less digits than its factorization.

243533201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212370.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 243533201 is about 15605.5503267267. The cubic root of 243533201 is about 624.4812343840.

Adding to 243533201 its reverse (102335342), we get a palindrome (345868543).

The spelling of 243533201 in words is "two hundred forty-three million, five hundred thirty-three thousand, two hundred one".