22450221 has 6 divisors (see below), whose sum is σ = 32428110. Its totient is φ = 14966808.

The previous prime is 22450199. The next prime is 22450273. The reversal of 22450221 is 12205422.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 1929321 = 4530^2 + 1389^2 .

It is not a de Polignac number, because 22450221 - 2⁹ = 22449709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22450194 and 22450203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22450291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1247226 + ... + 1247243.

It is an arithmetic number, because the mean of its divisors is an integer number (5404685).

Almost surely, 2^22450221 is an apocalyptic number.

It is an amenable number.

22450221 is a deficient number, since it is larger than the sum of its proper divisors (9977889).

22450221 is a wasteful number, since it uses less digits than its factorization.

22450221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494475 (or 2494472 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22450221 is about 4738.1664175079. The cubic root of 22450221 is about 282.1024601276.

Adding to 22450221 its reverse (12205422), we get a palindrome (34655643).

The spelling of 22450221 in words is "twenty-two million, four hundred fifty thousand, two hundred twenty-one".