22216541 has 2 divisors, whose sum is σ = 22216542. Its totient is φ = 22216540.

The previous prime is 22216531. The next prime is 22216549. The reversal of 22216541 is 14561222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20894041 + 1322500 = 4571^2 + 1150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22216541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22216549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11108270 + 11108271.

It is an arithmetic number, because the mean of its divisors is an integer number (11108271).

Almost surely, 2^22216541 is an apocalyptic number.

It is an amenable number.

22216541 is a deficient number, since it is larger than the sum of its proper divisors (1).

22216541 is an equidigital number, since it uses as much as digits as its factorization.

22216541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 23.

The square root of 22216541 is about 4713.4425847781. The cubic root of 22216541 is about 281.1202610832.

Adding to 22216541 its reverse (14561222), we get a palindrome (36777763).

The spelling of 22216541 in words is "twenty-two million, two hundred sixteen thousand, five hundred forty-one".