16218227 has 2 divisors, whose sum is σ = 16218228. Its totient is φ = 16218226.

The previous prime is 16218217. The next prime is 16218259. The reversal of 16218227 is 72281261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16218227 - 2⁴ = 16218211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16218227.

It is not a weakly prime, because it can be changed into another prime (16218217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8109113 + 8109114.

It is an arithmetic number, because the mean of its divisors is an integer number (8109114).

Almost surely, 2^16218227 is an apocalyptic number.

16218227 is a deficient number, since it is larger than the sum of its proper divisors (1).

16218227 is an equidigital number, since it uses as much as digits as its factorization.

16218227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 29.

The square root of 16218227 is about 4027.1859902418. The cubic root of 16218227 is about 253.1246606102.

Adding to 16218227 its reverse (72281261), we get a palindrome (88499488).

The spelling of 16218227 in words is "sixteen million, two hundred eighteen thousand, two hundred twenty-seven".