221422214 has 16 divisors (see below), whose sum is σ = 360503808. Its totient is φ = 101388672.

The previous prime is 221422211. The next prime is 221422237. The reversal of 221422214 is 412224122.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422211) 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, 30227 + ... + 36830.

It is an arithmetic number, because the mean of its divisors is an integer number (22531488).

Almost surely, 2^221422214 is an apocalyptic number.

221422214 is a deficient number, since it is larger than the sum of its proper divisors (139081594).

221422214 is a wasteful number, since it uses less digits than its factorization.

221422214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67199.

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

The square root of 221422214 is about 14880.2625648878. The cubic root of 221422214 is about 604.9791345854.

Adding to 221422214 its reverse (412224122), we get a palindrome (633646336).

The spelling of 221422214 in words is "two hundred twenty-one million, four hundred twenty-two thousand, two hundred fourteen".