22250221 has 16 divisors (see below), whose sum is σ = 26928000. Its totient is φ = 17978688.

The previous prime is 22250213. The next prime is 22250227. The reversal of 22250221 is 12205222.

It is not a de Polignac number, because 22250221 - 2³ = 22250213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22250195 and 22250204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22250227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7455 + ... + 10003.

It is an arithmetic number, because the mean of its divisors is an integer number (1683000).

Almost surely, 2^22250221 is an apocalyptic number.

It is an amenable number.

22250221 is a deficient number, since it is larger than the sum of its proper divisors (4677779).

22250221 is a wasteful number, since it uses less digits than its factorization.

22250221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 22250221 is about 4717.0139919233. The cubic root of 22250221 is about 281.2622476313.

Adding to 22250221 its reverse (12205222), we get a palindrome (34455443).

The spelling of 22250221 in words is "twenty-two million, two hundred fifty thousand, two hundred twenty-one".