204144013 has 4 divisors (see below), whose sum is σ = 205201948. Its totient is φ = 203086080.

The previous prime is 204143993. The next prime is 204144023. The reversal of 204144013 is 310441402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37785609 + 166358404 = 6147^2 + 12898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204144013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204144023) 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, 528678 + ... + 529063.

It is an arithmetic number, because the mean of its divisors is an integer number (51300487).

Almost surely, 2^204144013 is an apocalyptic number.

It is an amenable number.

204144013 is a deficient number, since it is larger than the sum of its proper divisors (1057935).

204144013 is a wasteful number, since it uses less digits than its factorization.

204144013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057934.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 204144013 is about 14287.8974310428. The cubic root of 204144013 is about 588.8150237338.

Adding to 204144013 its reverse (310441402), we get a palindrome (514585415).

The spelling of 204144013 in words is "two hundred four million, one hundred forty-four thousand, thirteen".