205511141 has 8 divisors (see below), whose sum is σ = 233941824. Its totient is φ = 178705120.

The previous prime is 205511129. The next prime is 205511149. The reversal of 205511141 is 141115502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205511141 - 2¹⁸ = 205248997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205511149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405896 + ... + 406401.

It is an arithmetic number, because the mean of its divisors is an integer number (29242728).

Almost surely, 2^205511141 is an apocalyptic number.

It is an amenable number.

205511141 is a deficient number, since it is larger than the sum of its proper divisors (28430683).

205511141 is a wasteful number, since it uses less digits than its factorization.

205511141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812331.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 205511141 is about 14335.6597685631. The cubic root of 205511141 is about 590.1265083503.

Adding to 205511141 its reverse (141115502), we get a palindrome (346626643).

The spelling of 205511141 in words is "two hundred five million, five hundred eleven thousand, one hundred forty-one".