205559641 has 4 divisors (see below), whose sum is σ = 234925312. Its totient is φ = 176193972.

The previous prime is 205559621. The next prime is 205559663. The reversal of 205559641 is 146955502.

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 205559641 - 2⁷ = 205559513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205559641.

It is not an unprimeable number, because it can be changed into a prime (205559611) 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, 14682825 + ... + 14682838.

It is an arithmetic number, because the mean of its divisors is an integer number (58731328).

Almost surely, 2^205559641 is an apocalyptic number.

It is an amenable number.

205559641 is a deficient number, since it is larger than the sum of its proper divisors (29365671).

205559641 is an equidigital number, since it uses as much as digits as its factorization.

205559641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29365670.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 205559641 is about 14337.3512546774. The cubic root of 205559641 is about 590.1729273819.

The spelling of 205559641 in words is "two hundred five million, five hundred fifty-nine thousand, six hundred forty-one".