211216 has 20 divisors (see below), whose sum is σ = 420112. Its totient is φ = 102816.

The previous prime is 211213. The next prime is 211217. The reversal of 211216 is 612112.

It is a super-2 number, since 2×211216² = 89224397312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211196 and 211205.

It is not an unprimeable number, because it can be changed into a prime (211213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535 + ... + 841.

2²¹¹²¹⁶ is an apocalyptic number.

It is an amenable number.

211216 is a deficient number, since it is larger than the sum of its proper divisors (208896).

211216 is a wasteful number, since it uses less digits than its factorization.

211216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 352 counting only the distinct ones).

The product of its digits is 24, while the sum is 13.

The square root of 211216 is about 459.5824191590. The cubic root of 211216 is about 59.5537259242.

Adding to 211216 its reverse (612112), we get a palindrome (823328).

The spelling of 211216 in words is "two hundred eleven thousand, two hundred sixteen".