211218033 has 16 divisors (see below), whose sum is σ = 303872576. Its totient is φ = 129729600.

The previous prime is 211218023. The next prime is 211218037. The reversal of 211218033 is 330812112.

It is not a de Polignac number, because 211218033 - 2⁸ = 211217777 is a prime.

It is a super-2 number, since 2×211218033² = 89226114928778178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211218037) 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, 16383 + ... + 26283.

It is an arithmetic number, because the mean of its divisors is an integer number (18992036).

Almost surely, 2^211218033 is an apocalyptic number.

It is an amenable number.

211218033 is a deficient number, since it is larger than the sum of its proper divisors (92654543).

211218033 is a wasteful number, since it uses less digits than its factorization.

211218033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10464.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 211218033 is about 14533.3421139117. The cubic root of 211218033 is about 595.5391699609.

The spelling of 211218033 in words is "two hundred eleven million, two hundred eighteen thousand, thirty-three".