3824309221 has 2 divisors, whose sum is σ = 3824309222. Its totient is φ = 3824309220.

The previous prime is 3824309219. The next prime is 3824309231. The reversal of 3824309221 is 1229034283.

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., 3818004100 + 6305121 = 61790^2 + 2511^2 .

It is a cyclic number.

It is not a de Polignac number, because 3824309221 - 2¹ = 3824309219 is a prime.

Together with 3824309219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3824309231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1912154610 + 1912154611.

It is an arithmetic number, because the mean of its divisors is an integer number (1912154611).

Almost surely, 2^3824309221 is an apocalyptic number.

It is an amenable number.

3824309221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3824309221 is an equidigital number, since it uses as much as digits as its factorization.

3824309221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 3824309221 is about 61840.9995148849. Note that the first 3 decimals coincide. The cubic root of 3824309221 is about 1563.8112515957.

The spelling of 3824309221 in words is "three billion, eight hundred twenty-four million, three hundred nine thousand, two hundred twenty-one".