5561321 has 2 divisors, whose sum is σ = 5561322. Its totient is φ = 5561320.

The previous prime is 5561299. The next prime is 5561333. The reversal of 5561321 is 1231655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3115225 + 2446096 = 1765^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561321 - 2²² = 1367017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5561341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780660 + 2780661.

It is an arithmetic number, because the mean of its divisors is an integer number (2780661).

Almost surely, 2^5561321 is an apocalyptic number.

It is an amenable number.

5561321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561321 is an equidigital number, since it uses as much as digits as its factorization.

5561321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 23.

The square root of 5561321 is about 2358.2453222682. The cubic root of 5561321 is about 177.1710073382.

Adding to 5561321 its reverse (1231655), we get a palindrome (6792976).

The spelling of 5561321 in words is "five million, five hundred sixty-one thousand, three hundred twenty-one".