5531321 has 2 divisors, whose sum is σ = 5531322. Its totient is φ = 5531320.

The previous prime is 5531311. The next prime is 5531347. The reversal of 5531321 is 1231355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4791721 + 739600 = 2189^2 + 860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5531321 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5531293 and 5531302.

It is not a weakly prime, because it can be changed into another prime (5531311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765660 + 2765661.

It is an arithmetic number, because the mean of its divisors is an integer number (2765661).

Almost surely, 2^5531321 is an apocalyptic number.

It is an amenable number.

5531321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5531321 is an equidigital number, since it uses as much as digits as its factorization.

5531321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 20.

The square root of 5531321 is about 2351.8760596596. The cubic root of 5531321 is about 176.8518555706.

Adding to 5531321 its reverse (1231355), we get a palindrome (6762676).

The spelling of 5531321 in words is "five million, five hundred thirty-one thousand, three hundred twenty-one".