205147841 has 4 divisors (see below), whose sum is σ = 205177284. Its totient is φ = 205118400.

The previous prime is 205147793. The next prime is 205147849. The reversal of 205147841 is 148741502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 39639616 + 165508225 = 6296^2 + 12865^2 .

It is a cyclic number.

It is not a de Polignac number, because 205147841 - 2¹⁰ = 205146817 is a prime.

It is a super-2 number, since 2×205147841² = 84171273333922562, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205147798 and 205147807.

It is not an unprimeable number, because it can be changed into a prime (205147849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2261 + ... + 20381.

It is an arithmetic number, because the mean of its divisors is an integer number (51294321).

Almost surely, 2^205147841 is an apocalyptic number.

It is an amenable number.

205147841 is a deficient number, since it is larger than the sum of its proper divisors (29443).

205147841 is a wasteful number, since it uses less digits than its factorization.

205147841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29442.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 205147841 is about 14322.9829644526. The cubic root of 205147841 is about 589.7785638425.

The spelling of 205147841 in words is "two hundred five million, one hundred forty-seven thousand, eight hundred forty-one".