205504130 has 16 divisors (see below), whose sum is σ = 398362104. Its totient is φ = 75878400.

The previous prime is 205504127. The next prime is 205504147. The reversal of 205504130 is 31405502.

It can be written as a sum of positive squares in 4 ways, for example, as 184334929 + 21169201 = 13577^2 + 4601^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790271 + ... + 790530.

Almost surely, 2^205504130 is an apocalyptic number.

205504130 is a deficient number, since it is larger than the sum of its proper divisors (192857974).

205504130 is a wasteful number, since it uses less digits than its factorization.

205504130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580821.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 205504130 is about 14335.4152363997. The cubic root of 205504130 is about 590.1197975641.

Adding to 205504130 its reverse (31405502), we get a palindrome (236909632).

The spelling of 205504130 in words is "two hundred five million, five hundred four thousand, one hundred thirty".