205430144 has 16 divisors (see below), whose sum is σ = 409255620. Its totient is φ = 102715008.

The previous prime is 205430083. The next prime is 205430177. The reversal of 205430144 is 441034502.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 802334 + ... + 802589.

Almost surely, 2^205430144 is an apocalyptic number.

It is an amenable number.

205430144 is a deficient number, since it is larger than the sum of its proper divisors (203825476).

205430144 is an equidigital number, since it uses as much as digits as its factorization.

205430144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604937 (or 1604925 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 205430144 is about 14332.8344719389. The cubic root of 205430144 is about 590.0489703680.

Adding to 205430144 its reverse (441034502), we get a palindrome (646464646).

The spelling of 205430144 in words is "two hundred five million, four hundred thirty thousand, one hundred forty-four".