22504213 has 2 divisors, whose sum is σ = 22504214. Its totient is φ = 22504212.

The previous prime is 22504201. The next prime is 22504217. The reversal of 22504213 is 31240522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16467364 + 6036849 = 4058^2 + 2457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22504213 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22504217) 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, 11252106 + 11252107.

It is an arithmetic number, because the mean of its divisors is an integer number (11252107).

Almost surely, 2^22504213 is an apocalyptic number.

It is an amenable number.

22504213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22504213 is an equidigital number, since it uses as much as digits as its factorization.

22504213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 22504213 is about 4743.8605586589. The cubic root of 22504213 is about 282.3284279415.

Adding to 22504213 its reverse (31240522), we get a palindrome (53744735).

The spelling of 22504213 in words is "twenty-two million, five hundred four thousand, two hundred thirteen".