5208221 has 4 divisors (see below), whose sum is σ = 5262012. Its totient is φ = 5154432.

The previous prime is 5208209. The next prime is 5208227. The reversal of 5208221 is 1228025.

5208221 = T₂₇₈ + T₂₇₉ + ... + T₃₇₄.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1651225 + 3556996 = 1285^2 + 1886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5208221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5208193 and 5208202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5208227) 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, 26750 + ... + 26943.

It is an arithmetic number, because the mean of its divisors is an integer number (1315503).

Almost surely, 2^5208221 is an apocalyptic number.

It is an amenable number.

5208221 is a deficient number, since it is larger than the sum of its proper divisors (53791).

5208221 is an equidigital number, since it uses as much as digits as its factorization.

5208221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53790.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 5208221 is about 2282.1527118052. The cubic root of 5208221 is about 173.3390723774.

The spelling of 5208221 in words is "five million, two hundred eight thousand, two hundred twenty-one".