22720271 has 6 divisors (see below), whose sum is σ = 26429760. Its totient is φ = 19474476.

The previous prime is 22720267. The next prime is 22720277. The reversal of 22720271 is 17202722.

It is not a de Polignac number, because 22720271 - 2² = 22720267 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22720277) 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, 231791 + ... + 231888.

It is an arithmetic number, because the mean of its divisors is an integer number (4404960).

Almost surely, 2^22720271 is an apocalyptic number.

22720271 is a deficient number, since it is larger than the sum of its proper divisors (3709489).

22720271 is an equidigital number, since it uses as much as digits as its factorization.

22720271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463693 (or 463686 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 22720271 is about 4766.5785423089. The cubic root of 22720271 is about 283.2290761360.

Adding to 22720271 its reverse (17202722), we get a palindrome (39922993).

The spelling of 22720271 in words is "twenty-two million, seven hundred twenty thousand, two hundred seventy-one".