205465005 has 28 divisors (see below), whose sum is σ = 369674460. Its totient is φ = 109579392.

The previous prime is 205464991. The next prime is 205465061. The reversal of 205465005 is 500564502.

205465005 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 650 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38900169 + 166564836 = 6237^2 + 12906^2 .

It is not a de Polignac number, because 205465005 - 2⁴ = 205464989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 205465005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 24540 + ... + 31829.

Almost surely, 2^205465005 is an apocalyptic number.

It is an amenable number.

205465005 is a deficient number, since it is larger than the sum of its proper divisors (164209455).

205465005 is an frugal number, since it uses more digits than its factorization.

205465005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56392 (or 56377 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 205465005 is about 14334.0505440716. The cubic root of 205465005 is about 590.0823451092.

The spelling of 205465005 in words is "two hundred five million, four hundred sixty-five thousand, five".