204451223 has 2 divisors, whose sum is σ = 204451224. Its totient is φ = 204451222.

The previous prime is 204451217. The next prime is 204451241. The reversal of 204451223 is 322154402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204451223 is a prime.

It is a super-3 number, since 3×204451223³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204451243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102225611 + 102225612.

It is an arithmetic number, because the mean of its divisors is an integer number (102225612).

Almost surely, 2^204451223 is an apocalyptic number.

204451223 is a deficient number, since it is larger than the sum of its proper divisors (1).

204451223 is an equidigital number, since it uses as much as digits as its factorization.

204451223 is an odious number, because the sum of its binary digits is odd.

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

The square root of 204451223 is about 14298.6440965568. The cubic root of 204451223 is about 589.1102388584.

The spelling of 204451223 in words is "two hundred four million, four hundred fifty-one thousand, two hundred twenty-three".