22241281 has 2 divisors, whose sum is σ = 22241282. Its totient is φ = 22241280.

The previous prime is 22241279. The next prime is 22241309. The reversal of 22241281 is 18214222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22240656 + 625 = 4716^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 22241281 - 2¹ = 22241279 is a prime.

It is a super-2 number, since 2×22241281² = 989349161041922, which contains 22 as substring.

Together with 22241279, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22241201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11120640 + 11120641.

It is an arithmetic number, because the mean of its divisors is an integer number (11120641).

It is a Proth number, since it is equal to 2715 ⋅ 2¹³ + 1 and 2715 < 2¹³.

Almost surely, 2^22241281 is an apocalyptic number.

It is an amenable number.

22241281 is a deficient number, since it is larger than the sum of its proper divisors (1).

22241281 is an equidigital number, since it uses as much as digits as its factorization.

22241281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 22.

The square root of 22241281 is about 4716.0662633173. The cubic root of 22241281 is about 281.2245727794.

It can be divided in two parts, 22241 and 281, that added together give a palindrome (22522).

The spelling of 22241281 in words is "twenty-two million, two hundred forty-one thousand, two hundred eighty-one".