22204541 has 2 divisors, whose sum is σ = 22204542. Its totient is φ = 22204540.

The previous prime is 22204531. The next prime is 22204571. The reversal of 22204541 is 14540222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21808900 + 395641 = 4670^2 + 629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22204541 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 (22204531) 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, 11102270 + 11102271.

It is an arithmetic number, because the mean of its divisors is an integer number (11102271).

Almost surely, 2^22204541 is an apocalyptic number.

It is an amenable number.

22204541 is a deficient number, since it is larger than the sum of its proper divisors (1).

22204541 is an equidigital number, since it uses as much as digits as its factorization.

22204541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 22204541 is about 4712.1694579037. The cubic root of 22204541 is about 281.0696373807.

Adding to 22204541 its reverse (14540222), we get a palindrome (36744763).

The spelling of 22204541 in words is "twenty-two million, two hundred four thousand, five hundred forty-one".