22285221 has 16 divisors (see below), whose sum is σ = 34425984. Its totient is φ = 12559104.

The previous prime is 22285213. The next prime is 22285259. The reversal of 22285221 is 12258222.

It is not a de Polignac number, because 22285221 - 2³ = 22285213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22285191 and 22285200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22285261) 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 15 ways as a sum of consecutive naturals, for example, 5736 + ... + 8801.

It is an arithmetic number, because the mean of its divisors is an integer number (2151624).

Almost surely, 2^22285221 is an apocalyptic number.

22285221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22285221 is a deficient number, since it is larger than the sum of its proper divisors (12140763).

22285221 is a wasteful number, since it uses less digits than its factorization.

22285221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14620.

The product of its digits is 1280, while the sum is 24.

The square root of 22285221 is about 4720.7225082608. The cubic root of 22285221 is about 281.4096472381.

The spelling of 22285221 in words is "twenty-two million, two hundred eighty-five thousand, two hundred twenty-one".