3243621305 has 8 divisors (see below), whose sum is σ = 3892716744. Its totient is φ = 2594649600.

The previous prime is 3243621239. The next prime is 3243621323. The reversal of 3243621305 is 5031263423.

It can be written as a sum of positive squares in 4 ways, for example, as 636906169 + 2606715136 = 25237^2 + 51056^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3243621305 - 2⁸ = 3243621049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42665 + ... + 91145.

It is an arithmetic number, because the mean of its divisors is an integer number (486589593).

Almost surely, 2^3243621305 is an apocalyptic number.

It is an amenable number.

3243621305 is a deficient number, since it is larger than the sum of its proper divisors (649095439).

3243621305 is a wasteful number, since it uses less digits than its factorization.

3243621305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61867.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 3243621305 is about 56952.7989215631. The cubic root of 3243621305 is about 1480.2783298367.

Adding to 3243621305 its reverse (5031263423), we get a palindrome (8274884728).

The spelling of 3243621305 in words is "three billion, two hundred forty-three million, six hundred twenty-one thousand, three hundred five".