243242233 has 4 divisors (see below), whose sum is σ = 261953188. Its totient is φ = 224531280.

The previous prime is 243242231. The next prime is 243242243. The reversal of 243242233 is 332242342.

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 40094224 + 203148009 = 6332^2 + 14253^2 .

It is a cyclic number.

It is not a de Polignac number, because 243242233 - 2¹ = 243242231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243242198 and 243242207.

It is not an unprimeable number, because it can be changed into a prime (243242231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9355458 + ... + 9355483.

It is an arithmetic number, because the mean of its divisors is an integer number (65488297).

Almost surely, 2^243242233 is an apocalyptic number.

It is an amenable number.

243242233 is a deficient number, since it is larger than the sum of its proper divisors (18710955).

243242233 is a wasteful number, since it uses less digits than its factorization.

243242233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18710954.

The product of its digits is 6912, while the sum is 25.

The square root of 243242233 is about 15596.2249599062. The cubic root of 243242233 is about 624.2324298837.

Adding to 243242233 its reverse (332242342), we get a palindrome (575484575).

The spelling of 243242233 in words is "two hundred forty-three million, two hundred forty-two thousand, two hundred thirty-three".