10643221 has 2 divisors, whose sum is σ = 10643222. Its totient is φ = 10643220.

The previous prime is 10643209. The next prime is 10643239. The reversal of 10643221 is 12234601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10491121 + 152100 = 3239^2 + 390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10643221 is a prime.

It is a super-2 number, since 2×10643221² = 226556306509682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10643201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5321610 + 5321611.

It is an arithmetic number, because the mean of its divisors is an integer number (5321611).

Almost surely, 2^10643221 is an apocalyptic number.

It is an amenable number.

10643221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10643221 is an equidigital number, since it uses as much as digits as its factorization.

10643221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 10643221 is about 3262.3949791526. The cubic root of 10643221 is about 219.9670818516.

Adding to 10643221 its reverse (12234601), we get a palindrome (22877822).

The spelling of 10643221 in words is "ten million, six hundred forty-three thousand, two hundred twenty-one".