205122533401 has 4 divisors (see below), whose sum is σ = 205123447732. Its totient is φ = 205121619072.

The previous prime is 205122533377. The next prime is 205122533411. The reversal of 205122533401 is 104335221502.

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 15719141376 + 189403392025 = 125376^2 + 435205^2 .

It is a cyclic number.

It is not a de Polignac number, because 205122533401 - 2²¹ = 205120436249 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 205122533401.

It is not an unprimeable number, because it can be changed into a prime (205122533411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135181 + ... + 654613.

It is an arithmetic number, because the mean of its divisors is an integer number (51280861933).

Almost surely, 2^205122533401 is an apocalyptic number.

It is an amenable number.

205122533401 is a deficient number, since it is larger than the sum of its proper divisors (914331).

205122533401 is an equidigital number, since it uses as much as digits as its factorization.

205122533401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914330.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 205122533401 its reverse (104335221502), we get a palindrome (309457754903).

The spelling of 205122533401 in words is "two hundred five billion, one hundred twenty-two million, five hundred thirty-three thousand, four hundred one".