22215841 has 2 divisors, whose sum is σ = 22215842. Its totient is φ = 22215840.

The previous prime is 22215839. The next prime is 22215847. The reversal of 22215841 is 14851222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12103441 + 10112400 = 3479^2 + 3180^2 .

It is a cyclic number.

It is not a de Polignac number, because 22215841 - 2¹ = 22215839 is a prime.

Together with 22215839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22215847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11107920 + 11107921.

It is an arithmetic number, because the mean of its divisors is an integer number (11107921).

Almost surely, 2^22215841 is an apocalyptic number.

It is an amenable number.

22215841 is a deficient number, since it is larger than the sum of its proper divisors (1).

22215841 is an equidigital number, since it uses as much as digits as its factorization.

22215841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280, while the sum is 25.

The square root of 22215841 is about 4713.3683284887. The cubic root of 22215841 is about 281.1173085347.

The spelling of 22215841 in words is "twenty-two million, two hundred fifteen thousand, eight hundred forty-one".