216765086 has 16 divisors (see below), whose sum is σ = 331706448. Its totient is φ = 106209600.

The previous prime is 216765083. The next prime is 216765097. The reversal of 216765086 is 680567612.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216765083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31121 + ... + 37443.

It is an arithmetic number, because the mean of its divisors is an integer number (20731653).

Almost surely, 2^216765086 is an apocalyptic number.

216765086 is a deficient number, since it is larger than the sum of its proper divisors (114941362).

216765086 is a wasteful number, since it uses less digits than its factorization.

216765086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 216765086 is about 14722.9442028420. The cubic root of 216765086 is about 600.7075781901.

It can be divided in two parts, 21676 and 5086, that added together give a palindrome (26762).

The spelling of 216765086 in words is "two hundred sixteen million, seven hundred sixty-five thousand, eighty-six".