216031065 has 16 divisors (see below), whose sum is σ = 360678528. Its totient is φ = 110206976.

The previous prime is 216031001. The next prime is 216031069. The reversal of 216031065 is 560130612.

It is a cyclic number.

It is not a de Polignac number, because 216031065 - 2⁶ = 216031001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216031069) 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, 312744 + ... + 313433.

It is an arithmetic number, because the mean of its divisors is an integer number (22542408).

Almost surely, 2^216031065 is an apocalyptic number.

It is an amenable number.

216031065 is a deficient number, since it is larger than the sum of its proper divisors (144647463).

216031065 is a wasteful number, since it uses less digits than its factorization.

216031065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626208.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 216031065 is about 14697.9952714647. The cubic root of 216031065 is about 600.0287625101.

Adding to 216031065 its reverse (560130612), we get a palindrome (776161677).

The spelling of 216031065 in words is "two hundred sixteen million, thirty-one thousand, sixty-five".