205004210 has 16 divisors (see below), whose sum is σ = 373680000. Its totient is φ = 80963376.

The previous prime is 205004201. The next prime is 205004213. The reversal of 205004210 is 12400502.

It is a super-2 number, since 2×205004210² = 84053452235448200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205004213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128960 + ... + 130539.

It is an arithmetic number, because the mean of its divisors is an integer number (23355000).

Almost surely, 2^205004210 is an apocalyptic number.

205004210 is a deficient number, since it is larger than the sum of its proper divisors (168675790).

205004210 is a wasteful number, since it uses less digits than its factorization.

205004210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259585.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 205004210 is about 14317.9680820988. The cubic root of 205004210 is about 589.6408903453.

Adding to 205004210 its reverse (12400502), we get a palindrome (217404712).

The spelling of 205004210 in words is "two hundred five million, four thousand, two hundred ten".