204436081 has 2 divisors, whose sum is σ = 204436082. Its totient is φ = 204436080.

The previous prime is 204436049. The next prime is 204436123. The reversal of 204436081 is 180634402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179024400 + 25411681 = 13380^2 + 5041^2 .

It is a cyclic number.

It is not a de Polignac number, because 204436081 - 2⁵ = 204436049 is a prime.

It is a super-2 number, since 2×204436081² = 83588222429277122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204436021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102218040 + 102218041.

It is an arithmetic number, because the mean of its divisors is an integer number (102218041).

Almost surely, 2^204436081 is an apocalyptic number.

It is an amenable number.

204436081 is a deficient number, since it is larger than the sum of its proper divisors (1).

204436081 is an equidigital number, since it uses as much as digits as its factorization.

204436081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 204436081 is about 14298.1145959878. The cubic root of 204436081 is about 589.0956950024.

The spelling of 204436081 in words is "two hundred four million, four hundred thirty-six thousand, eighty-one".