5513821 has 2 divisors, whose sum is σ = 5513822. Its totient is φ = 5513820.

The previous prime is 5513779. The next prime is 5513843. The reversal of 5513821 is 1283155.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2937796 + 2576025 = 1714^2 + 1605^2 .

It is a cyclic number.

It is not a de Polignac number, because 5513821 - 2¹¹ = 5511773 is a prime.

It is a plaindrome in base 9.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5513891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2756910 + 2756911.

It is an arithmetic number, because the mean of its divisors is an integer number (2756911).

Almost surely, 2^5513821 is an apocalyptic number.

It is an amenable number.

5513821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5513821 is an equidigital number, since it uses as much as digits as its factorization.

5513821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 25.

The square root of 5513821 is about 2348.1526781707. The cubic root of 5513821 is about 176.6651504953.

Adding to 5513821 its reverse (1283155), we get a palindrome (6796976).

The spelling of 5513821 in words is "five million, five hundred thirteen thousand, eight hundred twenty-one".