205450005 has 8 divisors (see below), whose sum is σ = 328720032. Its totient is φ = 109573328.

The previous prime is 205449997. The next prime is 205450031. The reversal of 205450005 is 500054502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205450005 - 2³ = 205449997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6848319 + ... + 6848348.

It is an arithmetic number, because the mean of its divisors is an integer number (41090004).

Almost surely, 2^205450005 is an apocalyptic number.

It is an amenable number.

205450005 is a deficient number, since it is larger than the sum of its proper divisors (123270027).

205450005 is a wasteful number, since it uses less digits than its factorization.

205450005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13696675.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 205450005 is about 14333.5273048891. The cubic root of 205450005 is about 590.0679850798.

The spelling of 205450005 in words is "two hundred five million, four hundred fifty thousand, five".