205500541 has 4 divisors (see below), whose sum is σ = 206300412. Its totient is φ = 204700672.

The previous prime is 205500527. The next prime is 205500551. The reversal of 205500541 is 145005502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 120012025 + 85488516 = 10955^2 + 9246^2 .

It is a cyclic number.

It is not a de Polignac number, because 205500541 - 2¹³ = 205492349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205500511) 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, 399550 + ... + 400063.

It is an arithmetic number, because the mean of its divisors is an integer number (51575103).

Almost surely, 2^205500541 is an apocalyptic number.

It is an amenable number.

205500541 is a deficient number, since it is larger than the sum of its proper divisors (799871).

205500541 is an equidigital number, since it uses as much as digits as its factorization.

205500541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799870.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 205500541 is about 14335.2900563609. The cubic root of 205500541 is about 590.1163621874.

The spelling of 205500541 in words is "two hundred five million, five hundred thousand, five hundred forty-one".