22214421 has 6 divisors (see below), whose sum is σ = 32087510. Its totient is φ = 14809608.

The previous prime is 22214399. The next prime is 22214429. The reversal of 22214421 is 12441222.

22214421 is a `hidden beast` number, since 2 + 221 + 442 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22043025 + 171396 = 4695^2 + 414^2 .

It is not a de Polignac number, because 22214421 - 2⁹ = 22213909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22214394 and 22214403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22214429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1234126 + ... + 1234143.

Almost surely, 2^22214421 is an apocalyptic number.

It is an amenable number.

22214421 is a deficient number, since it is larger than the sum of its proper divisors (9873089).

22214421 is a wasteful number, since it uses less digits than its factorization.

22214421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468275 (or 2468272 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 22214421 is about 4713.2176907077. The cubic root of 22214421 is about 281.1113188885. Note that the first 3 decimals are identical.

Adding to 22214421 its reverse (12441222), we get a palindrome (34655643).

The spelling of 22214421 in words is "twenty-two million, two hundred fourteen thousand, four hundred twenty-one".