4022221 has 8 divisors (see below), whose sum is σ = 4662144. Its totient is φ = 3398640.

The previous prime is 4022203. The next prime is 4022257. The reversal of 4022221 is 1222204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4022221 - 2⁵ = 4022189 is a prime.

4022221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4022201) 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, 3550 + ... + 4543.

It is an arithmetic number, because the mean of its divisors is an integer number (582768).

Almost surely, 2^4022221 is an apocalyptic number.

It is an amenable number.

4022221 is a deficient number, since it is larger than the sum of its proper divisors (639923).

4022221 is an equidigital number, since it uses as much as digits as its factorization.

4022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8171.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4022221 is about 2005.5475561552. The cubic root of 4022221 is about 159.0335095440.

Adding to 4022221 its reverse (1222204), we get a palindrome (5244425).

The spelling of 4022221 in words is "four million, twenty-two thousand, two hundred twenty-one".