22303213 has 2 divisors, whose sum is σ = 22303214. Its totient is φ = 22303212.

The previous prime is 22303199. The next prime is 22303217. The reversal of 22303213 is 31230322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22297284 + 5929 = 4722^2 + 77^2 .

It is a cyclic number.

It is not a de Polignac number, because 22303213 - 2⁵ = 22303181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22303217) 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, 11151606 + 11151607.

It is an arithmetic number, because the mean of its divisors is an integer number (11151607).

Almost surely, 2^22303213 is an apocalyptic number.

It is an amenable number.

22303213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22303213 is an equidigital number, since it uses as much as digits as its factorization.

22303213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 22303213 is about 4722.6277642855. The cubic root of 22303213 is about 281.4853590056.

Adding to 22303213 its reverse (31230322), we get a palindrome (53533535).

The spelling of 22303213 in words is "twenty-two million, three hundred three thousand, two hundred thirteen".