205868081 has 8 divisors (see below), whose sum is σ = 207541824. Its totient is φ = 204199920.

The previous prime is 205868063. The next prime is 205868099. The reversal of 205868081 is 180868502.

It is an interprime number because it is at equal distance from previous prime (205868063) and next prime (205868099).

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 205868081 - 2²² = 201673777 is a prime.

It is a super-2 number, since 2×205868081² = 84763333549245122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205868041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101366 + ... + 103376.

It is an arithmetic number, because the mean of its divisors is an integer number (25942728).

Almost surely, 2^205868081 is an apocalyptic number.

It is an amenable number.

205868081 is a deficient number, since it is larger than the sum of its proper divisors (1673743).

205868081 is a wasteful number, since it uses less digits than its factorization.

205868081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 205868081 is about 14348.1037423069. The cubic root of 205868081 is about 590.4679625463.

The spelling of 205868081 in words is "two hundred five million, eight hundred sixty-eight thousand, eighty-one".