205105401 has 6 divisors (see below), whose sum is σ = 296263370. Its totient is φ = 136736928.

The previous prime is 205105379. The next prime is 205105427. The reversal of 205105401 is 104501502.

It can be written as a sum of positive squares in only one way, i.e., 189778176 + 15327225 = 13776^2 + 3915^2 .

It is not a de Polignac number, because 205105401 - 2²² = 200911097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205105471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11394736 + ... + 11394753.

Almost surely, 2^205105401 is an apocalyptic number.

It is an amenable number.

205105401 is a deficient number, since it is larger than the sum of its proper divisors (91157969).

205105401 is a wasteful number, since it uses less digits than its factorization.

205105401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22789495 (or 22789492 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 205105401 is about 14321.5013528610. The cubic root of 205105401 is about 589.7378908521.

Adding to 205105401 its reverse (104501502), we get a palindrome (309606903).

The spelling of 205105401 in words is "two hundred five million, one hundred five thousand, four hundred one".