216015227 has 4 divisors (see below), whose sum is σ = 220091040. Its totient is φ = 211939416.

The previous prime is 216015211. The next prime is 216015257. The reversal of 216015227 is 722510612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216015227 - 2⁴ = 216015211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216015196 and 216015205.

It is not an unprimeable number, because it can be changed into a prime (216015257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2037827 + ... + 2037932.

It is an arithmetic number, because the mean of its divisors is an integer number (55022760).

Almost surely, 2^216015227 is an apocalyptic number.

216015227 is a deficient number, since it is larger than the sum of its proper divisors (4075813).

216015227 is an equidigital number, since it uses as much as digits as its factorization.

216015227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075812.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 216015227 is about 14697.4564806296. The cubic root of 216015227 is about 600.0140987428.

Adding to 216015227 its reverse (722510612), we get a palindrome (938525839).

The spelling of 216015227 in words is "two hundred sixteen million, fifteen thousand, two hundred twenty-seven".