214240221 has 24 divisors (see below), whose sum is σ = 345610720. Its totient is φ = 131838192.

The previous prime is 214240217. The next prime is 214240231. The reversal of 214240221 is 122042412.

214240221 is a `hidden beast` number, since 21 + 424 + 0 + 221 = 666.

It is not a de Polignac number, because 214240221 - 2² = 214240217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 214240194 and 214240203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214240231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30751 + ... + 37068.

Almost surely, 2^214240221 is an apocalyptic number.

It is an amenable number.

214240221 is a deficient number, since it is larger than the sum of its proper divisors (131370499).

214240221 is an equidigital number, since it uses as much as digits as its factorization.

214240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67847 (or 67835 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 214240221 is about 14636.9471202160. The cubic root of 214240221 is about 598.3661298190.

Adding to 214240221 its reverse (122042412), we get a palindrome (336282633).

The spelling of 214240221 in words is "two hundred fourteen million, two hundred forty thousand, two hundred twenty-one".