305222218 has 16 divisors (see below), whose sum is σ = 540117504. Its totient is φ = 126589680.

The previous prime is 305222201. The next prime is 305222219. The reversal of 305222218 is 812222503.

It is a junction number, because it is equal to n+sod(n) for n = 305222192 and 305222201.

It is not an unprimeable number, because it can be changed into a prime (305222219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351205 + ... + 352072.

It is an arithmetic number, because the mean of its divisors is an integer number (33757344).

Almost surely, 2^305222218 is an apocalyptic number.

305222218 is a deficient number, since it is larger than the sum of its proper divisors (234895286).

305222218 is a wasteful number, since it uses less digits than its factorization.

305222218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703317.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 305222218 is about 17470.6101210004. The cubic root of 305222218 is about 673.2949875776.

The spelling of 305222218 in words is "three hundred five million, two hundred twenty-two thousand, two hundred eighteen".