105216218 has 4 divisors (see below), whose sum is σ = 157824330. Its totient is φ = 52608108.

The previous prime is 105216193. The next prime is 105216233. The reversal of 105216218 is 812612501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 99940009 + 5276209 = 9997^2 + 2297^2 .

It is a super-2 number, since 2×105216218² = 22140905060447048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26304053 + ... + 26304056.

Almost surely, 2^105216218 is an apocalyptic number.

105216218 is a deficient number, since it is larger than the sum of its proper divisors (52608112).

105216218 is an equidigital number, since it uses as much as digits as its factorization.

105216218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52608111.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 105216218 is about 10257.4956982687. The cubic root of 105216218 is about 472.0930015199.

Adding to 105216218 its reverse (812612501), we get a palindrome (917828719).

The spelling of 105216218 in words is "one hundred five million, two hundred sixteen thousand, two hundred eighteen".