205430 has 8 divisors (see below), whose sum is σ = 369792. Its totient is φ = 82168.

The previous prime is 205427. The next prime is 205433. The reversal of 205430 is 34502.

205430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (205427) and next prime (205433).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205433) 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, 10262 + ... + 10281.

It is an arithmetic number, because the mean of its divisors is an integer number (46224).

2²⁰⁵⁴³⁰ is an apocalyptic number.

205430 is a deficient number, since it is larger than the sum of its proper divisors (164362).

205430 is a wasteful number, since it uses less digits than its factorization.

205430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20550.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 205430 is about 453.2438637202. The cubic root of 205430 is about 59.0048832499.

Adding to 205430 its reverse (34502), we get a palindrome (239932).

The spelling of 205430 in words is "two hundred five thousand, four hundred thirty".