243122045131 has 4 divisors (see below), whose sum is σ = 277853765872. Its totient is φ = 208390324392.

The previous prime is 243122045093. The next prime is 243122045237. The reversal of 243122045131 is 131540221342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243122045131 - 2¹⁹ = 243121520843 is a prime.

It is a super-2 number, since 2×243122045131² (a number of 24 digits) contains 22 as substring.

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 243122045131.

It is not an unprimeable number, because it can be changed into a prime (243122085131) 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, 17365860360 + ... + 17365860373.

It is an arithmetic number, because the mean of its divisors is an integer number (69463441468).

Almost surely, 2^243122045131 is an apocalyptic number.

243122045131 is a deficient number, since it is larger than the sum of its proper divisors (34731720741).

243122045131 is an equidigital number, since it uses as much as digits as its factorization.

243122045131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34731720740.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 243122045131 its reverse (131540221342), we get a palindrome (374662266473).

The spelling of 243122045131 in words is "two hundred forty-three billion, one hundred twenty-two million, forty-five thousand, one hundred thirty-one".