243203122241 has 4 divisors (see below), whose sum is σ = 243204125892. Its totient is φ = 243202118592.

The previous prime is 243203122223. The next prime is 243203122271. The reversal of 243203122241 is 142221302342.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 157883049025 + 85320073216 = 397345^2 + 292096^2 .

It is a cyclic number.

It is not a de Polignac number, because 243203122241 - 2¹⁴ = 243203105857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243203122241.

It is not an unprimeable number, because it can be changed into a prime (243203122271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111605 + ... + 706301.

It is an arithmetic number, because the mean of its divisors is an integer number (60801031473).

Almost surely, 2^243203122241 is an apocalyptic number.

It is an amenable number.

243203122241 is a deficient number, since it is larger than the sum of its proper divisors (1003651).

243203122241 is an equidigital number, since it uses as much as digits as its factorization.

243203122241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003650.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 243203122241 its reverse (142221302342), we get a palindrome (385424424583).

The spelling of 243203122241 in words is "two hundred forty-three billion, two hundred three million, one hundred twenty-two thousand, two hundred forty-one".