205156005 has 32 divisors (see below), whose sum is σ = 347880960. Its totient is φ = 103057920.

The previous prime is 205156001. The next prime is 205156019. The reversal of 205156005 is 500651502.

It is not a de Polignac number, because 205156005 - 2² = 205156001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205156001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12084 + ... + 23586.

It is an arithmetic number, because the mean of its divisors is an integer number (10871280).

Almost surely, 2^205156005 is an apocalyptic number.

It is an amenable number.

205156005 is a deficient number, since it is larger than the sum of its proper divisors (142724955).

205156005 is a wasteful number, since it uses less digits than its factorization.

205156005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11581.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 205156005 is about 14323.2679581163. The cubic root of 205156005 is about 589.7863872871.

The spelling of 205156005 in words is "two hundred five million, one hundred fifty-six thousand, five".