22050221 has 2 divisors, whose sum is σ = 22050222. Its totient is φ = 22050220.

The previous prime is 22050209. The next prime is 22050229. The reversal of 22050221 is 12205022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19758025 + 2292196 = 4445^2 + 1514^2 .

It is a cyclic number.

It is not a de Polignac number, because 22050221 - 2⁶ = 22050157 is a prime.

It is a super-2 number, since 2×22050221² = 972424492297682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22050196 and 22050205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22050229) 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, 11025110 + 11025111.

It is an arithmetic number, because the mean of its divisors is an integer number (11025111).

Almost surely, 2^22050221 is an apocalyptic number.

It is an amenable number.

22050221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22050221 is an equidigital number, since it uses as much as digits as its factorization.

22050221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 22050221 is about 4695.7662846441. The cubic root of 22050221 is about 280.4169849968.

Adding to 22050221 its reverse (12205022), we get a palindrome (34255243).

The spelling of 22050221 in words is "twenty-two million, fifty thousand, two hundred twenty-one".