205640301 has 4 divisors (see below), whose sum is σ = 274187072. Its totient is φ = 137093532.

The previous prime is 205640269. The next prime is 205640317. The reversal of 205640301 is 103046502.

It is a happy number.

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 not a de Polignac number, because 205640301 - 2⁵ = 205640269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205640101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34273381 + ... + 34273386.

It is an arithmetic number, because the mean of its divisors is an integer number (68546768).

Almost surely, 2^205640301 is an apocalyptic number.

It is an amenable number.

205640301 is a deficient number, since it is larger than the sum of its proper divisors (68546771).

205640301 is an equidigital number, since it uses as much as digits as its factorization.

205640301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68546770.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 205640301 is about 14340.1639111971. The cubic root of 205640301 is about 590.2501103722.

Adding to 205640301 its reverse (103046502), we get a palindrome (308686803).

The spelling of 205640301 in words is "two hundred five million, six hundred forty thousand, three hundred one".