204533149 has 2 divisors, whose sum is σ = 204533150. Its totient is φ = 204533148.

The previous prime is 204533141. The next prime is 204533207. The reversal of 204533149 is 941335402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201129124 + 3404025 = 14182^2 + 1845^2 .

It is a cyclic number.

It is not a de Polignac number, because 204533149 - 2³ = 204533141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204533149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204533141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102266574 + 102266575.

It is an arithmetic number, because the mean of its divisors is an integer number (102266575).

Almost surely, 2^204533149 is an apocalyptic number.

It is an amenable number.

204533149 is a deficient number, since it is larger than the sum of its proper divisors (1).

204533149 is an equidigital number, since it uses as much as digits as its factorization.

204533149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 204533149 is about 14301.5086267149. The cubic root of 204533149 is about 589.1889161416.

The spelling of 204533149 in words is "two hundred four million, five hundred thirty-three thousand, one hundred forty-nine".