22228813 has 2 divisors, whose sum is σ = 22228814. Its totient is φ = 22228812.

The previous prime is 22228793. The next prime is 22228831. The reversal of 22228813 is 31882222.

Together with next prime (22228831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22071204 + 157609 = 4698^2 + 397^2 .

It is a cyclic number.

It is not a de Polignac number, because 22228813 - 2⁹ = 22228301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22228853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11114406 + 11114407.

It is an arithmetic number, because the mean of its divisors is an integer number (11114407).

Almost surely, 2^22228813 is an apocalyptic number.

It is an amenable number.

22228813 is a deficient number, since it is larger than the sum of its proper divisors (1).

22228813 is an equidigital number, since it uses as much as digits as its factorization.

22228813 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 22228813 is about 4714.7442136345. The cubic root of 22228813 is about 281.1720134062.

The spelling of 22228813 in words is "twenty-two million, two hundred twenty-eight thousand, eight hundred thirteen".