205161267 has 8 divisors (see below), whose sum is σ = 273630096. Its totient is φ = 136733312.

The previous prime is 205161241. The next prime is 205161269. The reversal of 205161267 is 762161502.

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

It is a cyclic number.

It is not a de Polignac number, because 205161267 - 2⁷ = 205161139 is a prime.

It is a super-2 number, since 2×205161267² = 84182290954090578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205161269) 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 in 7 ways as a sum of consecutive naturals, for example, 4543 + ... + 20759.

It is an arithmetic number, because the mean of its divisors is an integer number (34203762).

Almost surely, 2^205161267 is an apocalyptic number.

205161267 is a deficient number, since it is larger than the sum of its proper divisors (68468829).

205161267 is a wasteful number, since it uses less digits than its factorization.

205161267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20437.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 205161267 is about 14323.4516440696. The cubic root of 205161267 is about 589.7914296766.

The spelling of 205161267 in words is "two hundred five million, one hundred sixty-one thousand, two hundred sixty-seven".