205540441 has 4 divisors (see below), whose sum is σ = 207109584. Its totient is φ = 203971300.

The previous prime is 205540403. The next prime is 205540457. The reversal of 205540441 is 144045502.

It is a happy number.

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 205540441 - 2²³ = 197151833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205540471) 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, 784375 + ... + 784636.

It is an arithmetic number, because the mean of its divisors is an integer number (51777396).

Almost surely, 2^205540441 is an apocalyptic number.

It is an amenable number.

205540441 is a deficient number, since it is larger than the sum of its proper divisors (1569143).

205540441 is a wasteful number, since it uses less digits than its factorization.

205540441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569142.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 205540441 is about 14336.6816592962. The cubic root of 205540441 is about 590.1545520612.

Adding to 205540441 its reverse (144045502), we get a palindrome (349585943).

The spelling of 205540441 in words is "two hundred five million, five hundred forty thousand, four hundred forty-one".