10628221 has 2 divisors, whose sum is σ = 10628222. Its totient is φ = 10628220.

The previous prime is 10628209. The next prime is 10628227. The reversal of 10628221 is 12282601.

10628221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9696996 + 931225 = 3114^2 + 965^2 .

It is an emirp because it is prime and its reverse (12282601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10628221 - 2⁹ = 10627709 is a prime.

It is a super-2 number, since 2×10628221² = 225918163249682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10628192 and 10628201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10628227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5314110 + 5314111.

It is an arithmetic number, because the mean of its divisors is an integer number (5314111).

Almost surely, 2^10628221 is an apocalyptic number.

It is an amenable number.

10628221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10628221 is an equidigital number, since it uses as much as digits as its factorization.

10628221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 10628221 is about 3260.0952440075. The cubic root of 10628221 is about 219.8636965609.

The spelling of 10628221 in words is "ten million, six hundred twenty-eight thousand, two hundred twenty-one".