205538005 has 16 divisors (see below), whose sum is σ = 261740160. Its totient is φ = 154610368.

The previous prime is 205537999. The next prime is 205538033. The reversal of 205538005 is 500835502.

It is a cyclic number.

It is not a de Polignac number, because 205538005 - 2¹⁷ = 205406933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8362 + ... + 21931.

It is an arithmetic number, because the mean of its divisors is an integer number (16358760).

Almost surely, 2^205538005 is an apocalyptic number.

It is an amenable number.

205538005 is a deficient number, since it is larger than the sum of its proper divisors (56202155).

205538005 is a wasteful number, since it uses less digits than its factorization.

205538005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30380.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 205538005 is about 14336.5967021466. The cubic root of 205538005 is about 590.1522206106.

The spelling of 205538005 in words is "two hundred five million, five hundred thirty-eight thousand, five".