243131522341 has 4 divisors (see below), whose sum is σ = 243132511500. Its totient is φ = 243130533184.

The previous prime is 243131522303. The next prime is 243131522441. The reversal of 243131522341 is 143225131342.

243131522341 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 228130416900 + 15001105441 = 477630^2 + 122479^2 .

It is a cyclic number.

It is not a de Polignac number, because 243131522341 - 2⁷ = 243131522213 is a prime.

It is a super-2 number, since 2×243131522341² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243131522441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189645 + ... + 722653.

It is an arithmetic number, because the mean of its divisors is an integer number (60783127875).

Almost surely, 2^243131522341 is an apocalyptic number.

It is an amenable number.

243131522341 is a deficient number, since it is larger than the sum of its proper divisors (989159).

243131522341 is an equidigital number, since it uses as much as digits as its factorization.

243131522341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989158.

The product of its digits is 17280, while the sum is 31.

Adding to 243131522341 its reverse (143225131342), we get a palindrome (386356653683).

The spelling of 243131522341 in words is "two hundred forty-three billion, one hundred thirty-one million, five hundred twenty-two thousand, three hundred forty-one".