918228219 has 16 divisors (see below), whose sum is σ = 1303228800. Its totient is φ = 573414336.

The previous prime is 918228217. The next prime is 918228239. The reversal of 918228219 is 912822819.

It is not a de Polignac number, because 918228219 - 2¹ = 918228217 is a prime.

It is a super-2 number, since 2×918228219² = 1686286124335823922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (918228217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85429 + ... + 95574.

It is an arithmetic number, because the mean of its divisors is an integer number (81451800).

Almost surely, 2^918228219 is an apocalyptic number.

918228219 is a deficient number, since it is larger than the sum of its proper divisors (385000581).

918228219 is a wasteful number, since it uses less digits than its factorization.

918228219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181114.

The product of its digits is 41472, while the sum is 42.

The square root of 918228219 is about 30302.2807557451. The cubic root of 918228219 is about 971.9640719417.

It can be divided in two parts, 9182 and 28219, that added together give a triangular number (37401 = T₂₇₃).

The spelling of 918228219 in words is "nine hundred eighteen million, two hundred twenty-eight thousand, two hundred nineteen".