216364655 has 16 divisors (see below), whose sum is σ = 288632064. Its totient is φ = 154621440.

The previous prime is 216364591. The next prime is 216364669. The reversal of 216364655 is 556463612.

It is a happy number.

It is not a de Polignac number, because 216364655 - 2⁶ = 216364591 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51674 + ... + 55703.

It is an arithmetic number, because the mean of its divisors is an integer number (18039504).

Almost surely, 2^216364655 is an apocalyptic number.

216364655 is a deficient number, since it is larger than the sum of its proper divisors (72267409).

216364655 is a wasteful number, since it uses less digits than its factorization.

216364655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107426.

The product of its digits is 129600, while the sum is 38.

The square root of 216364655 is about 14709.3390402152. The cubic root of 216364655 is about 600.3374536913.

The spelling of 216364655 in words is "two hundred sixteen million, three hundred sixty-four thousand, six hundred fifty-five".