204426251 has 2 divisors, whose sum is σ = 204426252. Its totient is φ = 204426250.

The previous prime is 204426223. The next prime is 204426269. The reversal of 204426251 is 152624402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204426251 - 2¹⁰ = 204425227 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204426251.

It is not a weakly prime, because it can be changed into another prime (204425251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102213125 + 102213126.

It is an arithmetic number, because the mean of its divisors is an integer number (102213126).

Almost surely, 2^204426251 is an apocalyptic number.

204426251 is a deficient number, since it is larger than the sum of its proper divisors (1).

204426251 is an equidigital number, since it uses as much as digits as its factorization.

204426251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 204426251 is about 14297.7708402394. The cubic root of 204426251 is about 589.0862529256.

The spelling of 204426251 in words is "two hundred four million, four hundred twenty-six thousand, two hundred fifty-one".