204161543 has 2 divisors, whose sum is σ = 204161544. Its totient is φ = 204161542.

The previous prime is 204161539. The next prime is 204161557. The reversal of 204161543 is 345161402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204161543 - 2² = 204161539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204167543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102080771 + 102080772.

It is an arithmetic number, because the mean of its divisors is an integer number (102080772).

Almost surely, 2^204161543 is an apocalyptic number.

204161543 is a deficient number, since it is larger than the sum of its proper divisors (1).

204161543 is an equidigital number, since it uses as much as digits as its factorization.

204161543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 204161543 is about 14288.5108741254. The cubic root of 204161543 is about 588.8318772478.

The spelling of 204161543 in words is "two hundred four million, one hundred sixty-one thousand, five hundred forty-three".