243320353321 has 8 divisors (see below), whose sum is σ = 245083311200. Its totient is φ = 241557573600.

The previous prime is 243320353313. The next prime is 243320353343. The reversal of 243320353321 is 123353023342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243320353321 - 2³ = 243320353313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243320353361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4056970 + ... + 4116508.

It is an arithmetic number, because the mean of its divisors is an integer number (30635413900).

Almost surely, 2^243320353321 is an apocalyptic number.

It is an amenable number.

243320353321 is a deficient number, since it is larger than the sum of its proper divisors (1762957879).

243320353321 is a wasteful number, since it uses less digits than its factorization.

243320353321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89079.

The product of its (nonzero) digits is 38880, while the sum is 31.

Adding to 243320353321 its reverse (123353023342), we get a palindrome (366673376663).

The spelling of 243320353321 in words is "two hundred forty-three billion, three hundred twenty million, three hundred fifty-three thousand, three hundred twenty-one".