221323214 has 16 divisors (see below), whose sum is σ = 381831648. Its totient is φ = 94247712.

The previous prime is 221323213. The next prime is 221323217. The reversal of 221323214 is 412323122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221323211) 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, 48149 + ... + 52544.

It is an arithmetic number, because the mean of its divisors is an integer number (23864478).

Almost surely, 2^221323214 is an apocalyptic number.

221323214 is a deficient number, since it is larger than the sum of its proper divisors (160508434).

221323214 is a wasteful number, since it uses less digits than its factorization.

221323214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100859.

The product of its digits is 576, while the sum is 20.

The square root of 221323214 is about 14876.9356387665. The cubic root of 221323214 is about 604.8889571491. Note that the first 3 decimals are identical.

Adding to 221323214 its reverse (412323122), we get a palindrome (633646336).

The spelling of 221323214 in words is "two hundred twenty-one million, three hundred twenty-three thousand, two hundred fourteen".