3226643221 has 2 divisors, whose sum is σ = 3226643222. Its totient is φ = 3226643220.

The previous prime is 3226643171. The next prime is 3226643257. The reversal of 3226643221 is 1223466223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2561776996 + 664866225 = 50614^2 + 25785^2 .

It is a cyclic number.

It is not a de Polignac number, because 3226643221 - 2¹⁹ = 3226118933 is a prime.

It is a super-2 number, since 2×3226643221² = 20822452951250509682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3226643261) 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, 1613321610 + 1613321611.

It is an arithmetic number, because the mean of its divisors is an integer number (1613321611).

Almost surely, 2^3226643221 is an apocalyptic number.

It is an amenable number.

3226643221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3226643221 is an equidigital number, since it uses as much as digits as its factorization.

3226643221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 31.

The square root of 3226643221 is about 56803.5493697357. The cubic root of 3226643221 is about 1477.6910705778.

The spelling of 3226643221 in words is "three billion, two hundred twenty-six million, six hundred forty-three thousand, two hundred twenty-one".