22214221 has 4 divisors (see below), whose sum is σ = 22686912. Its totient is φ = 21741532.

The previous prime is 22214201. The next prime is 22214233. The reversal of 22214221 is 12241222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22214221 - 2²³ = 13825613 is a prime.

It is a super-2 number, since 2×22214221² = 986943229273682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22214195 and 22214204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22214201) 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, 236275 + ... + 236368.

It is an arithmetic number, because the mean of its divisors is an integer number (5671728).

Almost surely, 2^22214221 is an apocalyptic number.

It is an amenable number.

22214221 is a deficient number, since it is larger than the sum of its proper divisors (472691).

22214221 is an equidigital number, since it uses as much as digits as its factorization.

22214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472690.

The product of its digits is 128, while the sum is 16.

The square root of 22214221 is about 4713.1964737320. The cubic root of 22214221 is about 281.1104752558.

Adding to 22214221 its reverse (12241222), we get a palindrome (34455443).

The spelling of 22214221 in words is "twenty-two million, two hundred fourteen thousand, two hundred twenty-one".