22288213 has 2 divisors, whose sum is σ = 22288214. Its totient is φ = 22288212.

The previous prime is 22288193. The next prime is 22288223. The reversal of 22288213 is 31288222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21743569 + 544644 = 4663^2 + 738^2 .

It is a cyclic number.

It is not a de Polignac number, because 22288213 - 2⁹ = 22287701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22288223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11144106 + 11144107.

It is an arithmetic number, because the mean of its divisors is an integer number (11144107).

Almost surely, 2^22288213 is an apocalyptic number.

It is an amenable number.

22288213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22288213 is an equidigital number, since it uses as much as digits as its factorization.

22288213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 28.

The square root of 22288213 is about 4721.0393982681. The cubic root of 22288213 is about 281.4222406363.

Subtracting 22288213 from its reverse (31288222), we obtain a palindrome (9000009).

The spelling of 22288213 in words is "twenty-two million, two hundred eighty-eight thousand, two hundred thirteen".