221017214 has 16 divisors (see below), whose sum is σ = 366024960. Its totient is φ = 99251160.

The previous prime is 221017193. The next prime is 221017219. The reversal of 221017214 is 412710122.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221017219) 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, 58694 + ... + 62345.

It is an arithmetic number, because the mean of its divisors is an integer number (22876560).

Almost surely, 2^221017214 is an apocalyptic number.

221017214 is a deficient number, since it is larger than the sum of its proper divisors (145007746).

221017214 is a wasteful number, since it uses less digits than its factorization.

221017214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121135.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 221017214 is about 14866.6477055186. The cubic root of 221017214 is about 604.6100567613.

Adding to 221017214 its reverse (412710122), we get a palindrome (633727336).

The spelling of 221017214 in words is "two hundred twenty-one million, seventeen thousand, two hundred fourteen".