205130 has 16 divisors (see below), whose sum is σ = 375624. Its totient is φ = 80640.

The previous prime is 205129. The next prime is 205133. The reversal of 205130 is 31502.

It can be written as a sum of positive squares in 4 ways, for example, as 182329 + 22801 = 427^2 + 151^2 .

It is not an unprimeable number, because it can be changed into a prime (205133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590 + ... + 870.

2²⁰⁵¹³⁰ is an apocalyptic number.

205130 is a deficient number, since it is larger than the sum of its proper divisors (170494).

205130 is a wasteful number, since it uses less digits than its factorization.

205130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 205130 is about 452.9127951383. The cubic root of 205130 is about 58.9761466345.

Adding to 205130 its reverse (31502), we get a palindrome (236632).

The spelling of 205130 in words is "two hundred five thousand, one hundred thirty".