243220320233 has 16 divisors (see below), whose sum is σ = 266423753664. Its totient is φ = 220199362560.

The previous prime is 243220320199. The next prime is 243220320241. The reversal of 243220320233 is 332023022342.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243220320233 is a prime.

It is a super-2 number, since 2×243220320233² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243220310233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19378466 + ... + 19391012.

It is an arithmetic number, because the mean of its divisors is an integer number (16651484604).

Almost surely, 2^243220320233 is an apocalyptic number.

It is an amenable number.

243220320233 is a deficient number, since it is larger than the sum of its proper divisors (23203433431).

243220320233 is a wasteful number, since it uses less digits than its factorization.

243220320233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19672.

The product of its (nonzero) digits is 10368, while the sum is 26.

Adding to 243220320233 its reverse (332023022342), we get a palindrome (575243342575).

The spelling of 243220320233 in words is "two hundred forty-three billion, two hundred twenty million, three hundred twenty thousand, two hundred thirty-three".