22042213 has 2 divisors, whose sum is σ = 22042214. Its totient is φ = 22042212.

The previous prime is 22042199. The next prime is 22042219. The reversal of 22042213 is 31224022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13380964 + 8661249 = 3658^2 + 2943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22042213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22042219) 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, 11021106 + 11021107.

It is an arithmetic number, because the mean of its divisors is an integer number (11021107).

Almost surely, 2^22042213 is an apocalyptic number.

It is an amenable number.

22042213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22042213 is an equidigital number, since it uses as much as digits as its factorization.

22042213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22042213 is about 4694.9135242302. The cubic root of 22042213 is about 280.3830344510.

Adding to 22042213 its reverse (31224022), we get a palindrome (53266235).

The spelling of 22042213 in words is "twenty-two million, forty-two thousand, two hundred thirteen".