3850216721 has 8 divisors (see below), whose sum is σ = 4326665280. Its totient is φ = 3399522192.

The previous prime is 3850216717. The next prime is 3850216751. The reversal of 3850216721 is 1276120583.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3850216721 - 2² = 3850216717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3850216751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6438191 + ... + 6438788.

It is an arithmetic number, because the mean of its divisors is an integer number (540833160).

Almost surely, 2^3850216721 is an apocalyptic number.

It is an amenable number.

3850216721 is a deficient number, since it is larger than the sum of its proper divisors (476448559).

3850216721 is a wasteful number, since it uses less digits than its factorization.

3850216721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12877015.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 3850216721 is about 62050.1145929643. The cubic root of 3850216721 is about 1567.3346151696.

The spelling of 3850216721 in words is "three billion, eight hundred fifty million, two hundred sixteen thousand, seven hundred twenty-one".