221063218 has 8 divisors (see below), whose sum is σ = 331663212. Its totient is φ = 110508816.

The previous prime is 221063203. The next prime is 221063243. The reversal of 221063218 is 812360122.

It can be written as a sum of positive squares in 2 ways, for example, as 220908769 + 154449 = 14863^2 + 393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221063192 and 221063201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6096 + ... + 21892.

Almost surely, 2^221063218 is an apocalyptic number.

221063218 is a deficient number, since it is larger than the sum of its proper divisors (110599994).

221063218 is a wasteful number, since it uses less digits than its factorization.

221063218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22796.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 221063218 is about 14868.1948467190. The cubic root of 221063218 is about 604.6520030437.

The spelling of 221063218 in words is "two hundred twenty-one million, sixty-three thousand, two hundred eighteen".