22781227 has 6 divisors (see below), whose sum is σ = 26500668. Its totient is φ = 19526724.

The previous prime is 22781221. The next prime is 22781261. The reversal of 22781227 is 72218722.

It is not a de Polignac number, because 22781227 - 2¹⁵ = 22748459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22781221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 232413 + ... + 232510.

It is an arithmetic number, because the mean of its divisors is an integer number (4416778).

Almost surely, 2^22781227 is an apocalyptic number.

22781227 is a deficient number, since it is larger than the sum of its proper divisors (3719441).

22781227 is an equidigital number, since it uses as much as digits as its factorization.

22781227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464937 (or 464930 counting only the distinct ones).

The product of its digits is 6272, while the sum is 31.

The square root of 22781227 is about 4772.9683636077. The cubic root of 22781227 is about 283.4821408249.

Adding to 22781227 its reverse (72218722), we get a palindrome (94999949).

The spelling of 22781227 in words is "twenty-two million, seven hundred eighty-one thousand, two hundred twenty-seven".