22457221 has 16 divisors (see below), whose sum is σ = 25220160. Its totient is φ = 19872000.

The previous prime is 22457219. The next prime is 22457273. The reversal of 22457221 is 12275422.

It is a cyclic number.

It is not a de Polignac number, because 22457221 - 2¹ = 22457219 is a prime.

It is a super-3 number, since 3×22457221³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22457291) 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, 80935 + ... + 81211.

It is an arithmetic number, because the mean of its divisors is an integer number (1576260).

Almost surely, 2^22457221 is an apocalyptic number.

It is an amenable number.

22457221 is a deficient number, since it is larger than the sum of its proper divisors (2762939).

22457221 is a wasteful number, since it uses less digits than its factorization.

22457221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its digits is 2240, while the sum is 25.

The square root of 22457221 is about 4738.9050423067. The cubic root of 22457221 is about 282.1317770181.

The spelling of 22457221 in words is "twenty-two million, four hundred fifty-seven thousand, two hundred twenty-one".