5552221 has 2 divisors, whose sum is σ = 5552222. Its totient is φ = 5552220.

The previous prime is 5552219. The next prime is 5552231. The reversal of 5552221 is 1222555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3024121 + 2528100 = 1739^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 5552221 - 2¹ = 5552219 is a prime.

Together with 5552219, it forms a pair of twin primes.

5552221 is a lucky number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 5552192 and 5552201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5552201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2776110 + 2776111.

It is an arithmetic number, because the mean of its divisors is an integer number (2776111).

Almost surely, 2^5552221 is an apocalyptic number.

It is an amenable number.

5552221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5552221 is an equidigital number, since it uses as much as digits as its factorization.

5552221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000, while the sum is 22.

The square root of 5552221 is about 2356.3151317258. The cubic root of 5552221 is about 177.0743194981.

Adding to 5552221 its reverse (1222555), we get a palindrome (6774776).

The spelling of 5552221 in words is "five million, five hundred fifty-two thousand, two hundred twenty-one".