204051761 has 2 divisors, whose sum is σ = 204051762. Its totient is φ = 204051760.

The previous prime is 204051733. The next prime is 204051767. The reversal of 204051761 is 167150402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194323600 + 9728161 = 13940^2 + 3119^2 .

It is a cyclic number.

It is not a de Polignac number, because 204051761 - 2¹⁸ = 203789617 is a prime.

It is a super-2 number, since 2×204051761² = 83274242334402242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 204051761.

It is not a weakly prime, because it can be changed into another prime (204051767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102025880 + 102025881.

It is an arithmetic number, because the mean of its divisors is an integer number (102025881).

Almost surely, 2^204051761 is an apocalyptic number.

It is an amenable number.

204051761 is a deficient number, since it is larger than the sum of its proper divisors (1).

204051761 is an equidigital number, since it uses as much as digits as its factorization.

204051761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 204051761 is about 14284.6687395963. The cubic root of 204051761 is about 588.7263158537.

The spelling of 204051761 in words is "two hundred four million, fifty-one thousand, seven hundred sixty-one".