205775001 has 6 divisors (see below), whose sum is σ = 297230570. Its totient is φ = 137183328.

The previous prime is 205774979. The next prime is 205775027. The reversal of 205775001 is 100577502.

It can be written as a sum of positive squares in only one way, i.e., 131125401 + 74649600 = 11451^2 + 8640^2 .

It is not a de Polignac number, because 205775001 - 2⁹ = 205774489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205775041) 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, 11431936 + ... + 11431953.

Almost surely, 2^205775001 is an apocalyptic number.

It is an amenable number.

205775001 is a deficient number, since it is larger than the sum of its proper divisors (91455569).

205775001 is a wasteful number, since it uses less digits than its factorization.

205775001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22863895 (or 22863892 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 205775001 is about 14344.8597413847. The cubic root of 205775001 is about 590.3789588779.

The spelling of 205775001 in words is "two hundred five million, seven hundred seventy-five thousand, one".