26822221 has 2 divisors, whose sum is σ = 26822222. Its totient is φ = 26822220.

The previous prime is 26822189. The next prime is 26822227. The reversal of 26822221 is 12222862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24890121 + 1932100 = 4989^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 26822221 - 2⁵ = 26822189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26822227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13411110 + 13411111.

It is an arithmetic number, because the mean of its divisors is an integer number (13411111).

Almost surely, 2^26822221 is an apocalyptic number.

It is an amenable number.

26822221 is a deficient number, since it is larger than the sum of its proper divisors (1).

26822221 is an equidigital number, since it uses as much as digits as its factorization.

26822221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 25.

The square root of 26822221 is about 5179.0173778430. The cubic root of 26822221 is about 299.3401088022.

The spelling of 26822221 in words is "twenty-six million, eight hundred twenty-two thousand, two hundred twenty-one".