3242643221 has 2 divisors, whose sum is σ = 3242643222. Its totient is φ = 3242643220.

The previous prime is 3242643211. The next prime is 3242643233. The reversal of 3242643221 is 1223462423.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3201862225 + 40780996 = 56585^2 + 6386^2 .

It is an emirp because it is prime and its reverse (1223462423) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3242643221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3242643211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1621321610 + 1621321611.

It is an arithmetic number, because the mean of its divisors is an integer number (1621321611).

Almost surely, 2^3242643221 is an apocalyptic number.

It is an amenable number.

3242643221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3242643221 is an equidigital number, since it uses as much as digits as its factorization.

3242643221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 29.

The square root of 3242643221 is about 56944.2114793067. The cubic root of 3242643221 is about 1480.1295267998.

The spelling of 3242643221 in words is "three billion, two hundred forty-two million, six hundred forty-three thousand, two hundred twenty-one".