205132009 has 8 divisors (see below), whose sum is σ = 214909632. Its totient is φ = 195426000.

The previous prime is 205132007. The next prime is 205132021. The reversal of 205132009 is 900231502.

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 205132009 - 2¹ = 205132007 is a prime.

It is a super-2 number, since 2×205132009² = 84158282232752162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205132007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11994 + ... + 23539.

It is an arithmetic number, because the mean of its divisors is an integer number (26863704).

Almost surely, 2^205132009 is an apocalyptic number.

It is an amenable number.

205132009 is a deficient number, since it is larger than the sum of its proper divisors (9777623).

205132009 is a wasteful number, since it uses less digits than its factorization.

205132009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35807.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 205132009 is about 14322.4302756201. The cubic root of 205132009 is about 589.7633916714.

It can be divided in two parts, 20513 and 2009, that added together give a palindrome (22522).

The spelling of 205132009 in words is "two hundred five million, one hundred thirty-two thousand, nine".