205411 has 8 divisors (see below), whose sum is σ = 223344. Its totient is φ = 188160.

The previous prime is 205399. The next prime is 205417. The reversal of 205411 is 114502.

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 205411 - 2¹¹ = 203363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205391 and 205400.

It is not an unprimeable number, because it can be changed into a prime (205417) 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, 591 + ... + 871.

It is an arithmetic number, because the mean of its divisors is an integer number (27918).

2²⁰⁵⁴¹¹ is an apocalyptic number.

205411 is a deficient number, since it is larger than the sum of its proper divisors (17933).

205411 is a wasteful number, since it uses less digits than its factorization.

205411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 205411 is about 453.2229032165. Note that the first 3 decimals coincide. The cubic root of 205411 is about 59.0030640944.

Adding to 205411 its reverse (114502), we get a palindrome (319913).

Subtracting from 205411 its reverse (114502), we obtain a palindrome (90909).

It can be divided in two parts, 205 and 411, that multiplied together give a triangular number (84255 = T₄₁₀).

The spelling of 205411 in words is "two hundred five thousand, four hundred eleven".