204642223 has 2 divisors, whose sum is σ = 204642224. Its totient is φ = 204642222.

The previous prime is 204642211. The next prime is 204642233. The reversal of 204642223 is 322246402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204642223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204642233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102321111 + 102321112.

It is an arithmetic number, because the mean of its divisors is an integer number (102321112).

Almost surely, 2^204642223 is an apocalyptic number.

204642223 is a deficient number, since it is larger than the sum of its proper divisors (1).

204642223 is an equidigital number, since it uses as much as digits as its factorization.

204642223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 204642223 is about 14305.3214923678. The cubic root of 204642223 is about 589.2936322910.

Adding to 204642223 its reverse (322246402), we get a palindrome (526888625).

The spelling of 204642223 in words is "two hundred four million, six hundred forty-two thousand, two hundred twenty-three".