5216321 has 4 divisors (see below), whose sum is σ = 5690544. Its totient is φ = 4742100.

The previous prime is 5216311. The next prime is 5216327. The reversal of 5216321 is 1236125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5216321 - 2¹⁰ = 5215297 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5216293 and 5216302.

It is not an unprimeable number, because it can be changed into a prime (5216327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237095 + ... + 237116.

It is an arithmetic number, because the mean of its divisors is an integer number (1422636).

Almost surely, 2^5216321 is an apocalyptic number.

It is an amenable number.

5216321 is a deficient number, since it is larger than the sum of its proper divisors (474223).

5216321 is a wasteful number, since it uses less digits than its factorization.

5216321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474222.

The product of its digits is 360, while the sum is 20.

The square root of 5216321 is about 2283.9266625704. The cubic root of 5216321 is about 173.4288867459.

The spelling of 5216321 in words is "five million, two hundred sixteen thousand, three hundred twenty-one".