204181057 has 2 divisors, whose sum is σ = 204181058. Its totient is φ = 204181056.

The previous prime is 204181031. The next prime is 204181111. The reversal of 204181057 is 750181402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193098816 + 11082241 = 13896^2 + 3329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204181057 is a prime.

It is not a weakly prime, because it can be changed into another prime (204181007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102090528 + 102090529.

It is an arithmetic number, because the mean of its divisors is an integer number (102090529).

Almost surely, 2^204181057 is an apocalyptic number.

It is an amenable number.

204181057 is a deficient number, since it is larger than the sum of its proper divisors (1).

204181057 is an equidigital number, since it uses as much as digits as its factorization.

204181057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 204181057 is about 14289.1937141324. The cubic root of 204181057 is about 588.8506370642.

The spelling of 204181057 in words is "two hundred four million, one hundred eighty-one thousand, fifty-seven".