214243209 has 12 divisors (see below), whose sum is σ = 317826756. Its totient is φ = 138968352.

The previous prime is 214243199. The next prime is 214243241. The reversal of 214243209 is 902342412.

214243209 is a `hidden beast` number, since 214 + 243 + 209 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 207273609 + 6969600 = 14397^2 + 2640^2 .

It is not a de Polignac number, because 214243209 - 2⁹ = 214242697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (214243109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321354 + ... + 322019.

It is an arithmetic number, because the mean of its divisors is an integer number (26485563).

Almost surely, 2^214243209 is an apocalyptic number.

It is an amenable number.

214243209 is a deficient number, since it is larger than the sum of its proper divisors (103583547).

214243209 is a wasteful number, since it uses less digits than its factorization.

214243209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643416 (or 643413 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 214243209 is about 14637.0491903252. The cubic root of 214243209 is about 598.3689116024.

The spelling of 214243209 in words is "two hundred fourteen million, two hundred forty-three thousand, two hundred nine".