205632505 has 8 divisors (see below), whose sum is σ = 265740552. Its totient is φ = 151851648.

The previous prime is 205632491. The next prime is 205632529. The reversal of 205632505 is 505236502.

It can be written as a sum of positive squares in 4 ways, for example, as 19501056 + 186131449 = 4416^2 + 13643^2 .

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

It is not a de Polignac number, because 205632505 - 2¹⁷ = 205501433 is a prime.

It is a super-2 number, since 2×205632505² = 84569454225150050, which contains 22 as substring.

It is a Duffinian 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, 1581724 + ... + 1581853.

It is an arithmetic number, because the mean of its divisors is an integer number (33217569).

Almost surely, 2^205632505 is an apocalyptic number.

It is an amenable number.

205632505 is a deficient number, since it is larger than the sum of its proper divisors (60108047).

205632505 is a wasteful number, since it uses less digits than its factorization.

205632505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163595.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 205632505 is about 14339.8920846707. The cubic root of 205632505 is about 590.2426513154.

The spelling of 205632505 in words is "two hundred five million, six hundred thirty-two thousand, five hundred five".