205080511 has 4 divisors (see below), whose sum is σ = 205119000. Its totient is φ = 205042024.

The previous prime is 205080493. The next prime is 205080523. The reversal of 205080511 is 115080502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205080511 - 2¹⁷ = 204949439 is a prime.

It is a super-2 number, since 2×205080511² = 84116031984042242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205080541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9661 + ... + 22438.

It is an arithmetic number, because the mean of its divisors is an integer number (51279750).

Almost surely, 2^205080511 is an apocalyptic number.

205080511 is a deficient number, since it is larger than the sum of its proper divisors (38489).

205080511 is an equidigital number, since it uses as much as digits as its factorization.

205080511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38488.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 205080511 is about 14320.6323533565. The cubic root of 205080511 is about 589.7140345489.

Subtracting from 205080511 its reverse (115080502), we obtain a palindrome (90000009).

The spelling of 205080511 in words is "two hundred five million, eighty thousand, five hundred eleven".