204005881 has 2 divisors, whose sum is σ = 204005882. Its totient is φ = 204005880.

The previous prime is 204005861. The next prime is 204005903. The reversal of 204005881 is 188500402.

204005881 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., 197655481 + 6350400 = 14059^2 + 2520^2 .

It is a cyclic number.

It is not a de Polignac number, because 204005881 - 2⁵ = 204005849 is a prime.

It is a super-2 number, since 2×204005881² = 83236798965172322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204005801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102002940 + 102002941.

It is an arithmetic number, because the mean of its divisors is an integer number (102002941).

Almost surely, 2^204005881 is an apocalyptic number.

It is an amenable number.

204005881 is a deficient number, since it is larger than the sum of its proper divisors (1).

204005881 is an equidigital number, since it uses as much as digits as its factorization.

204005881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 204005881 is about 14283.0627317813. The cubic root of 204005881 is about 588.6821885076.

The spelling of 204005881 in words is "two hundred four million, five thousand, eight hundred eighty-one".