214213221 has 8 divisors (see below), whose sum is σ = 317352960. Its totient is φ = 142808796.

The previous prime is 214213217. The next prime is 214213249. The reversal of 214213221 is 122312412.

It is a happy number.

214213221 is a `hidden beast` number, since 21 + 421 + 3 + 221 = 666.

It is not a de Polignac number, because 214213221 - 2² = 214213217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 214213194 and 214213203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214213261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3966885 + ... + 3966938.

It is an arithmetic number, because the mean of its divisors is an integer number (39669120).

Almost surely, 2^214213221 is an apocalyptic number.

It is an amenable number.

214213221 is a deficient number, since it is larger than the sum of its proper divisors (103139739).

214213221 is an equidigital number, since it uses as much as digits as its factorization.

214213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7933832 (or 7933826 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 214213221 is about 14636.0247676751. The cubic root of 214213221 is about 598.3409920489.

Adding to 214213221 its reverse (122312412), we get a palindrome (336525633).

It can be divided in two parts, 21421 and 3221, that added together give a palindrome (24642).

The spelling of 214213221 in words is "two hundred fourteen million, two hundred thirteen thousand, two hundred twenty-one".