216091227 has 16 divisors (see below), whose sum is σ = 314560512. Its totient is φ = 130861920.

The previous prime is 216091201. The next prime is 216091231. The reversal of 216091227 is 722190612.

216091227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216091227 - 2¹⁴ = 216074843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216091194 and 216091203.

It is not an unprimeable number, because it can be changed into a prime (216091327) 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, 79078 + ... + 81764.

It is an arithmetic number, because the mean of its divisors is an integer number (19660032).

Almost surely, 2^216091227 is an apocalyptic number.

216091227 is a deficient number, since it is larger than the sum of its proper divisors (98469285).

216091227 is a wasteful number, since it uses less digits than its factorization.

216091227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 216091227 is about 14700.0417346346. The cubic root of 216091227 is about 600.0844575554.

The spelling of 216091227 in words is "two hundred sixteen million, ninety-one thousand, two hundred twenty-seven".