205531311201 has 8 divisors (see below), whose sum is σ = 274141737984. Its totient is φ = 136970879280.

The previous prime is 205531311163. The next prime is 205531311221. The reversal of 205531311201 is 102113135502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205531311201 - 2¹⁰ = 205531310177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205531311221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12489121 + ... + 12505566.

It is an arithmetic number, because the mean of its divisors is an integer number (34267717248).

Almost surely, 2^205531311201 is an apocalyptic number.

It is an amenable number.

205531311201 is a deficient number, since it is larger than the sum of its proper divisors (68610426783).

205531311201 is a wasteful number, since it uses less digits than its factorization.

205531311201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24997431.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 205531311201 its reverse (102113135502), we get a palindrome (307644446703).

The spelling of 205531311201 in words is "two hundred five billion, five hundred thirty-one million, three hundred eleven thousand, two hundred one".