204251129 has 2 divisors, whose sum is σ = 204251130. Its totient is φ = 204251128.

The previous prime is 204251111. The next prime is 204251149. The reversal of 204251129 is 921152402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196140025 + 8111104 = 14005^2 + 2848^2 .

It is a cyclic number.

It is not a de Polignac number, because 204251129 - 2⁸ = 204250873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204251098 and 204251107.

It is not a weakly prime, because it can be changed into another prime (204251149) 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, 102125564 + 102125565.

It is an arithmetic number, because the mean of its divisors is an integer number (102125565).

Almost surely, 2^204251129 is an apocalyptic number.

It is an amenable number.

204251129 is a deficient number, since it is larger than the sum of its proper divisors (1).

204251129 is an equidigital number, since it uses as much as digits as its factorization.

204251129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 204251129 is about 14291.6454266120. The cubic root of 204251129 is about 588.9179910476.

The spelling of 204251129 in words is "two hundred four million, two hundred fifty-one thousand, one hundred twenty-nine".