214214221 has 4 divisors (see below), whose sum is σ = 230692252. Its totient is φ = 197736192.

The previous prime is 214214207. The next prime is 214214237. The reversal of 214214221 is 122412412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47416996 + 166797225 = 6886^2 + 12915^2 .

It is a cyclic number.

It is not a de Polignac number, because 214214221 - 2⁹ = 214213709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214214251) 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 3 ways as a sum of consecutive naturals, for example, 8238996 + ... + 8239021.

It is an arithmetic number, because the mean of its divisors is an integer number (57673063).

Almost surely, 2^214214221 is an apocalyptic number.

It is an amenable number.

214214221 is a deficient number, since it is larger than the sum of its proper divisors (16478031).

214214221 is a wasteful number, since it uses less digits than its factorization.

214214221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16478030.

The product of its digits is 256, while the sum is 19.

The square root of 214214221 is about 14636.0589299169. The cubic root of 214214221 is about 598.3419231151.

Adding to 214214221 its reverse (122412412), we get a palindrome (336626633).

The spelling of 214214221 in words is "two hundred fourteen million, two hundred fourteen thousand, two hundred twenty-one".