204642441 has 6 divisors (see below), whose sum is σ = 295594650. Its totient is φ = 136428288.

The previous prime is 204642437. The next prime is 204642443. The reversal of 204642441 is 144246402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 204604416 + 38025 = 14304^2 + 195^2 .

It is not a de Polignac number, because 204642441 - 2² = 204642437 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204642443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11369016 + ... + 11369033.

It is an arithmetic number, because the mean of its divisors is an integer number (49265775).

Almost surely, 2^204642441 is an apocalyptic number.

It is an amenable number.

204642441 is a deficient number, since it is larger than the sum of its proper divisors (90952209).

204642441 is a wasteful number, since it uses less digits than its factorization.

204642441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22738055 (or 22738052 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 204642441 is about 14305.3291119079. The cubic root of 204642441 is about 589.2938415440.

Adding to 204642441 its reverse (144246402), we get a palindrome (348888843).

The spelling of 204642441 in words is "two hundred four million, six hundred forty-two thousand, four hundred forty-one".