211216533 has 16 divisors (see below), whose sum is σ = 311116800. Its totient is φ = 126388080.

The previous prime is 211216531. The next prime is 211216591. The reversal of 211216533 is 335612112.

211216533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211216533 - 2¹ = 211216531 is a prime.

It is a super-2 number, since 2×211216533² = 89224847625080178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211216531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37903 + ... + 43116.

It is an arithmetic number, because the mean of its divisors is an integer number (19444800).

Almost surely, 2^211216533 is an apocalyptic number.

It is an amenable number.

211216533 is a deficient number, since it is larger than the sum of its proper divisors (99900267).

211216533 is a wasteful number, since it uses less digits than its factorization.

211216533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81112.

The product of its digits is 1080, while the sum is 24.

The square root of 211216533 is about 14533.2905083467. The cubic root of 211216533 is about 595.5377601840.

Adding to 211216533 its reverse (335612112), we get a palindrome (546828645).

The spelling of 211216533 in words is "two hundred eleven million, two hundred sixteen thousand, five hundred thirty-three".