205450161 has 8 divisors (see below), whose sum is σ = 313066944. Its totient is φ = 117400080.

The previous prime is 205450153. The next prime is 205450163. The reversal of 205450161 is 161054502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205450161 - 2³ = 205450153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205450163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4891650 + ... + 4891691.

It is an arithmetic number, because the mean of its divisors is an integer number (39133368).

Almost surely, 2^205450161 is an apocalyptic number.

205450161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

205450161 is a deficient number, since it is larger than the sum of its proper divisors (107616783).

205450161 is an equidigital number, since it uses as much as digits as its factorization.

205450161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9783351.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 205450161 is about 14333.5327466748. The cubic root of 205450161 is about 590.0681344277.

The spelling of 205450161 in words is "two hundred five million, four hundred fifty thousand, one hundred sixty-one".