204216247 has 2 divisors, whose sum is σ = 204216248. Its totient is φ = 204216246.

The previous prime is 204216239. The next prime is 204216263. The reversal of 204216247 is 742612402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204216247 - 2³ = 204216239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204216217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102108123 + 102108124.

It is an arithmetic number, because the mean of its divisors is an integer number (102108124).

Almost surely, 2^204216247 is an apocalyptic number.

204216247 is a deficient number, since it is larger than the sum of its proper divisors (1).

204216247 is an equidigital number, since it uses as much as digits as its factorization.

204216247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 204216247 is about 14290.4250111744. The cubic root of 204216247 is about 588.8844640083.

Adding to 204216247 its reverse (742612402), we get a palindrome (946828649).

The spelling of 204216247 in words is "two hundred four million, two hundred sixteen thousand, two hundred forty-seven".