243113952881 has 2 divisors, whose sum is σ = 243113952882. Its totient is φ = 243113952880.

The previous prime is 243113952877. The next prime is 243113952883. The reversal of 243113952881 is 188259311342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161427168400 + 81686784481 = 401780^2 + 285809^2 .

It is a cyclic number.

It is not a de Polignac number, because 243113952881 - 2² = 243113952877 is a prime.

It is a super-2 number, since 2×243113952881² (a number of 24 digits) contains 22 as substring.

Together with 243113952883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243113952883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121556976440 + 121556976441.

It is an arithmetic number, because the mean of its divisors is an integer number (121556976441).

Almost surely, 2^243113952881 is an apocalyptic number.

It is an amenable number.

243113952881 is a deficient number, since it is larger than the sum of its proper divisors (1).

243113952881 is an equidigital number, since it uses as much as digits as its factorization.

243113952881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 47.

The spelling of 243113952881 in words is "two hundred forty-three billion, one hundred thirteen million, nine hundred fifty-two thousand, eight hundred eighty-one".