5221220218 has 16 divisors (see below), whose sum is σ = 8020732896. Its totient is φ = 2547745200.

The previous prime is 5221220203. The next prime is 5221220231. The reversal of 5221220218 is 8120221225.

It is a super-2 number, since 2×5221220218² = 54522281129703935048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5221220192 and 5221220201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79293 + ... + 129343.

It is an arithmetic number, because the mean of its divisors is an integer number (501295806).

Almost surely, 2^5221220218 is an apocalyptic number.

5221220218 is a deficient number, since it is larger than the sum of its proper divisors (2799512678).

5221220218 is a wasteful number, since it uses less digits than its factorization.

5221220218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51309.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 5221220218 is about 72258.0114450986. The cubic root of 5221220218 is about 1734.8316510657.

The spelling of 5221220218 in words is "five billion, two hundred twenty-one million, two hundred twenty thousand, two hundred eighteen".