205531201 has 4 divisors (see below), whose sum is σ = 206679600. Its totient is φ = 204382804.

The previous prime is 205531199. The next prime is 205531229. The reversal of 205531201 is 102135502.

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 205531201 - 2¹ = 205531199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205531231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573931 + ... + 574288.

It is an arithmetic number, because the mean of its divisors is an integer number (51669900).

Almost surely, 2^205531201 is an apocalyptic number.

It is an amenable number.

205531201 is a deficient number, since it is larger than the sum of its proper divisors (1148399).

205531201 is a wasteful number, since it uses less digits than its factorization.

205531201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148398.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 205531201 is about 14336.3594053721. The cubic root of 205531201 is about 590.1457085302.

Adding to 205531201 its reverse (102135502), we get a palindrome (307666703).

The spelling of 205531201 in words is "two hundred five million, five hundred thirty-one thousand, two hundred one".