205015065 has 16 divisors (see below), whose sum is σ = 339336000. Its totient is φ = 105570752.

The previous prime is 205015051. The next prime is 205015067. The reversal of 205015065 is 560510502.

It is a cyclic number.

It is not a de Polignac number, because 205015065 - 2⁴ = 205015049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205015067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235215 + ... + 236084.

It is an arithmetic number, because the mean of its divisors is an integer number (21208500).

Almost surely, 2^205015065 is an apocalyptic number.

It is an amenable number.

205015065 is a deficient number, since it is larger than the sum of its proper divisors (134320935).

205015065 is a wasteful number, since it uses less digits than its factorization.

205015065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471336.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 205015065 is about 14318.3471462316. The cubic root of 205015065 is about 589.6512973493.

Adding to 205015065 its reverse (560510502), we get a palindrome (765525567).

The spelling of 205015065 in words is "two hundred five million, fifteen thousand, sixty-five".