205461601 has 2 divisors, whose sum is σ = 205461602. Its totient is φ = 205461600.

The previous prime is 205461593. The next prime is 205461637. The reversal of 205461601 is 106164502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156125025 + 49336576 = 12495^2 + 7024^2 .

It is a cyclic number.

It is not a de Polignac number, because 205461601 - 2³ = 205461593 is a prime.

It is not a weakly prime, because it can be changed into another prime (205461671) 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, 102730800 + 102730801.

It is an arithmetic number, because the mean of its divisors is an integer number (102730801).

Almost surely, 2^205461601 is an apocalyptic number.

It is an amenable number.

205461601 is a deficient number, since it is larger than the sum of its proper divisors (1).

205461601 is an equidigital number, since it uses as much as digits as its factorization.

205461601 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 25.

The square root of 205461601 is about 14333.9318053352. The cubic root of 205461601 is about 590.0790864012.

The spelling of 205461601 in words is "two hundred five million, four hundred sixty-one thousand, six hundred one".