205205542336201 has 4 divisors (see below), whose sum is σ = 223860591639504. Its totient is φ = 186550493032900.

The previous prime is 205205542336187. The next prime is 205205542336213. The reversal of 205205542336201 is 102633245502502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205205542336201 - 2²⁹ = 205205005465289 is a prime.

It is a super-2 number, since 2×205205542336201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205205542336601) 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, 9327524651635 + ... + 9327524651656.

It is an arithmetic number, because the mean of its divisors is an integer number (55965147909876).

Almost surely, 2^{205205542336201} is an apocalyptic number.

It is an amenable number.

205205542336201 is a deficient number, since it is larger than the sum of its proper divisors (18655049303303).

205205542336201 is a wasteful number, since it uses less digits than its factorization.

205205542336201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18655049303302.

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 205205542336201 its reverse (102633245502502), we get a palindrome (307838787838703).

The spelling of 205205542336201 in words is "two hundred five trillion, two hundred five billion, five hundred forty-two million, three hundred thirty-six thousand, two hundred one".