383216321 has 8 divisors (see below), whose sum is σ = 387440064. Its totient is φ = 379001200.

The previous prime is 383216311. The next prime is 383216369. The reversal of 383216321 is 123612383.

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 383216321 - 2¹⁴ = 383199937 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (383216311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130556 + ... + 133458.

It is an arithmetic number, because the mean of its divisors is an integer number (48430008).

Almost surely, 2^383216321 is an apocalyptic number.

It is an amenable number.

383216321 is a deficient number, since it is larger than the sum of its proper divisors (4223743).

383216321 is a wasteful number, since it uses less digits than its factorization.

383216321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311.

The product of its digits is 5184, while the sum is 29.

The square root of 383216321 is about 19575.9117539899. The cubic root of 383216321 is about 726.3534423100.

The spelling of 383216321 in words is "three hundred eighty-three million, two hundred sixteen thousand, three hundred twenty-one".