206443841 has 8 divisors (see below), whose sum is σ = 208312104. Its totient is φ = 204583680.

The previous prime is 206443823. The next prime is 206443847. The reversal of 206443841 is 148344602.

It can be written as a sum of positive squares in 4 ways, for example, as 42706225 + 163737616 = 6535^2 + 12796^2 .

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 206443841 - 2¹⁸ = 206181697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206443798 and 206443807.

It is not an unprimeable number, because it can be changed into a prime (206443847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56531 + ... + 60071.

It is an arithmetic number, because the mean of its divisors is an integer number (26039013).

Almost surely, 2^206443841 is an apocalyptic number.

It is an amenable number.

206443841 is a deficient number, since it is larger than the sum of its proper divisors (1868263).

206443841 is a wasteful number, since it uses less digits than its factorization.

206443841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 206443841 is about 14368.1537088103. The cubic root of 206443841 is about 591.0179124460.

The spelling of 206443841 in words is "two hundred six million, four hundred forty-three thousand, eight hundred forty-one".