243204221443 has 4 divisors (see below), whose sum is σ = 245477158200. Its totient is φ = 240931284688.

The previous prime is 243204221431. The next prime is 243204221459. The reversal of 243204221443 is 344122402342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344122402342 = 2 ⋅172061201171.

It is a cyclic number.

It is not a de Polignac number, because 243204221443 - 2¹³ = 243204213251 is a prime.

It is a super-3 number, since 3×243204221443³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243204251443) 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, 1136468218 + ... + 1136468431.

It is an arithmetic number, because the mean of its divisors is an integer number (61369289550).

Almost surely, 2^243204221443 is an apocalyptic number.

243204221443 is a deficient number, since it is larger than the sum of its proper divisors (2272936757).

243204221443 is a wasteful number, since it uses less digits than its factorization.

243204221443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272936756.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 243204221443 its reverse (344122402342), we get a palindrome (587326623785).

The spelling of 243204221443 in words is "two hundred forty-three billion, two hundred four million, two hundred twenty-one thousand, four hundred forty-three".