243052220321 has 8 divisors (see below), whose sum is σ = 245592047400. Its totient is φ = 240513090048.

The previous prime is 243052220309. The next prime is 243052220357. The reversal of 243052220321 is 123022250342.

It can be written as a sum of positive squares in 4 ways, for example, as 12959317921 + 230092902400 = 113839^2 + 479680^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243052220321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243082220321) 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, 542375 + ... + 883331.

It is an arithmetic number, because the mean of its divisors is an integer number (30699005925).

Almost surely, 2^243052220321 is an apocalyptic number.

It is an amenable number.

243052220321 is a deficient number, since it is larger than the sum of its proper divisors (2539827079).

243052220321 is an equidigital number, since it uses as much as digits as its factorization.

243052220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348403.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 243052220321 its reverse (123022250342), we get a palindrome (366074470663).

The spelling of 243052220321 in words is "two hundred forty-three billion, fifty-two million, two hundred twenty thousand, three hundred twenty-one".