22217849 has 2 divisors, whose sum is σ = 22217850. Its totient is φ = 22217848.

The previous prime is 22217791. The next prime is 22217863. The reversal of 22217849 is 94871222.

22217849 is nontrivially palindromic in base 13.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22024249 + 193600 = 4693^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 22217849 - 2¹² = 22213753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22216849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11108924 + 11108925.

It is an arithmetic number, because the mean of its divisors is an integer number (11108925).

Almost surely, 2^22217849 is an apocalyptic number.

It is an amenable number.

22217849 is a deficient number, since it is larger than the sum of its proper divisors (1).

22217849 is an equidigital number, since it uses as much as digits as its factorization.

22217849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 22217849 is about 4713.5813348239. The cubic root of 22217849 is about 281.1257779649.

The spelling of 22217849 in words is "twenty-two million, two hundred seventeen thousand, eight hundred forty-nine".