204423101 has 2 divisors, whose sum is σ = 204423102. Its totient is φ = 204423100.

The previous prime is 204423073. The next prime is 204423133. The reversal of 204423101 is 101324402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202920025 + 1503076 = 14245^2 + 1226^2 .

It is a cyclic number.

It is not a de Polignac number, because 204423101 - 2²² = 200228797 is a prime.

It is a Chen prime.

It is equal to p_11310209 and since 204423101 and 11310209 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204423101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204423151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102211550 + 102211551.

It is an arithmetic number, because the mean of its divisors is an integer number (102211551).

Almost surely, 2^204423101 is an apocalyptic number.

It is an amenable number.

204423101 is a deficient number, since it is larger than the sum of its proper divisors (1).

204423101 is an equidigital number, since it uses as much as digits as its factorization.

204423101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 204423101 is about 14297.6606827830. The cubic root of 204423101 is about 589.0832271707.

Adding to 204423101 its reverse (101324402), we get a palindrome (305747503).

The spelling of 204423101 in words is "two hundred four million, four hundred twenty-three thousand, one hundred one".