204242251 has 2 divisors, whose sum is σ = 204242252. Its totient is φ = 204242250.

The previous prime is 204242249. The next prime is 204242261. The reversal of 204242251 is 152242402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204242251 - 2¹ = 204242249 is a prime.

Together with 204242249, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204242261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102121125 + 102121126.

It is an arithmetic number, because the mean of its divisors is an integer number (102121126).

Almost surely, 2^204242251 is an apocalyptic number.

204242251 is a deficient number, since it is larger than the sum of its proper divisors (1).

204242251 is an equidigital number, since it uses as much as digits as its factorization.

204242251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 204242251 is about 14291.3348221921. The cubic root of 204242251 is about 588.9094582678.

Adding to 204242251 its reverse (152242402), we get a palindrome (356484653).

The spelling of 204242251 in words is "two hundred four million, two hundred forty-two thousand, two hundred fifty-one".