22943221 has 12 divisors (see below), whose sum is σ = 26994060. Its totient is φ = 19440960.

The previous prime is 22943189. The next prime is 22943227. The reversal of 22943221 is 12234922.

It can be written as a sum of positive squares in 2 ways, for example, as 10595025 + 12348196 = 3255^2 + 3514^2 .

It is not a de Polignac number, because 22943221 - 2⁵ = 22943189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22943227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1731 + ... + 6991.

It is an arithmetic number, because the mean of its divisors is an integer number (2249505).

Almost surely, 2^22943221 is an apocalyptic number.

It is an amenable number.

22943221 is a deficient number, since it is larger than the sum of its proper divisors (4050839).

22943221 is an equidigital number, since it uses as much as digits as its factorization.

22943221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5364 (or 5357 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 22943221 is about 4789.9082454678. The cubic root of 22943221 is about 284.1524878715.

The spelling of 22943221 in words is "twenty-two million, nine hundred forty-three thousand, two hundred twenty-one".