22744213 has 2 divisors, whose sum is σ = 22744214. Its totient is φ = 22744212.

The previous prime is 22744199. The next prime is 22744223. The reversal of 22744213 is 31244722.

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., 18173169 + 4571044 = 4263^2 + 2138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22744213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22744223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11372106 + 11372107.

It is an arithmetic number, because the mean of its divisors is an integer number (11372107).

Almost surely, 2^22744213 is an apocalyptic number.

It is an amenable number.

22744213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22744213 is an equidigital number, since it uses as much as digits as its factorization.

22744213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 25.

The square root of 22744213 is about 4769.0893260664. The cubic root of 22744213 is about 283.3285275617.

Adding to 22744213 its reverse (31244722), we get a palindrome (53988935).

The spelling of 22744213 in words is "twenty-two million, seven hundred forty-four thousand, two hundred thirteen".