204043381 has 2 divisors, whose sum is σ = 204043382. Its totient is φ = 204043380.

The previous prime is 204043379. The next prime is 204043387. The reversal of 204043381 is 183340402.

204043381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180472356 + 23571025 = 13434^2 + 4855^2 .

It is a cyclic number.

It is not a de Polignac number, because 204043381 - 2¹ = 204043379 is a prime.

It is a super-2 number, since 2×204043381² = 83267402659822322, which contains 22 as substring.

Together with 204043379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204043387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102021690 + 102021691.

It is an arithmetic number, because the mean of its divisors is an integer number (102021691).

Almost surely, 2^204043381 is an apocalyptic number.

It is an amenable number.

204043381 is a deficient number, since it is larger than the sum of its proper divisors (1).

204043381 is an equidigital number, since it uses as much as digits as its factorization.

204043381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 204043381 is about 14284.3754151170. The cubic root of 204043381 is about 588.7182564704.

Adding to 204043381 its reverse (183340402), we get a palindrome (387383783).

The spelling of 204043381 in words is "two hundred four million, forty-three thousand, three hundred eighty-one".