205555411443241 has 4 divisors (see below), whose sum is σ = 208371238997332. Its totient is φ = 202739583889152.

The previous prime is 205555411443211. The next prime is 205555411443281. The reversal of 205555411443241 is 142344114555502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 147362604490000 + 58192806953241 = 12139300^2 + 7628421^2 .

It is a de Polignac number, because none of the positive numbers 2^k-205555411443241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205555411443191 and 205555411443200.

It is not an unprimeable number, because it can be changed into a prime (205555411443211) 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, 1407913776936 + ... + 1407913777081.

It is an arithmetic number, because the mean of its divisors is an integer number (52092809749333).

Almost surely, 2^{205555411443241} is an apocalyptic number.

It is an amenable number.

205555411443241 is a deficient number, since it is larger than the sum of its proper divisors (2815827554091).

205555411443241 is an equidigital number, since it uses as much as digits as its factorization.

205555411443241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815827554090.

The product of its (nonzero) digits is 1920000, while the sum is 46.

Adding to 205555411443241 its reverse (142344114555502), we get a palindrome (347899525998743).

The spelling of 205555411443241 in words is "two hundred five trillion, five hundred fifty-five billion, four hundred eleven million, four hundred forty-three thousand, two hundred forty-one".