206043641 has 4 divisors (see below), whose sum is σ = 206864784. Its totient is φ = 205222500.

The previous prime is 206043631. The next prime is 206043647. The reversal of 206043641 is 146340602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206043641 - 2¹⁸ = 205781497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 206043641.

It is not an unprimeable number, because it can be changed into a prime (206043647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410195 + ... + 410696.

It is an arithmetic number, because the mean of its divisors is an integer number (51716196).

Almost surely, 2^206043641 is an apocalyptic number.

It is an amenable number.

206043641 is a deficient number, since it is larger than the sum of its proper divisors (821143).

206043641 is an equidigital number, since it uses as much as digits as its factorization.

206043641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821142.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 206043641 is about 14354.2203201707. The cubic root of 206043641 is about 590.6357611059.

The spelling of 206043641 in words is "two hundred six million, forty-three thousand, six hundred forty-one".