214440221 has 4 divisors (see below), whose sum is σ = 214474812. Its totient is φ = 214405632.

The previous prime is 214440217. The next prime is 214440229. The reversal of 214440221 is 122044412.

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 151634596 + 62805625 = 12314^2 + 7925^2 .

It is a cyclic number.

It is not a de Polignac number, because 214440221 - 2² = 214440217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 214440193 and 214440202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214440229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5156 + ... + 21341.

It is an arithmetic number, because the mean of its divisors is an integer number (53618703).

Almost surely, 2^214440221 is an apocalyptic number.

It is an amenable number.

214440221 is a deficient number, since it is larger than the sum of its proper divisors (34591).

214440221 is an equidigital number, since it uses as much as digits as its factorization.

214440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34590.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 214440221 is about 14643.7775522575. Note that the first 3 decimals coincide. The cubic root of 214440221 is about 598.5522697901.

Adding to 214440221 its reverse (122044412), we get a palindrome (336484633).

The spelling of 214440221 in words is "two hundred fourteen million, four hundred forty thousand, two hundred twenty-one".