204161651 has 2 divisors, whose sum is σ = 204161652. Its totient is φ = 204161650.

The previous prime is 204161611. The next prime is 204161681. The reversal of 204161651 is 156161402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204161651 - 2¹⁴ = 204145267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204161651.

It is not a weakly prime, because it can be changed into another prime (204161611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102080825 + 102080826.

It is an arithmetic number, because the mean of its divisors is an integer number (102080826).

Almost surely, 2^204161651 is an apocalyptic number.

204161651 is a deficient number, since it is larger than the sum of its proper divisors (1).

204161651 is an equidigital number, since it uses as much as digits as its factorization.

204161651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 204161651 is about 14288.5146533851. The cubic root of 204161651 is about 588.8319810771.

The spelling of 204161651 in words is "two hundred four million, one hundred sixty-one thousand, six hundred fifty-one".