5445221 has 2 divisors, whose sum is σ = 5445222. Its totient is φ = 5445220.

The previous prime is 5445217. The next prime is 5445239. The reversal of 5445221 is 1225445.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3568321 + 1876900 = 1889^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 5445221 - 2² = 5445217 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5445421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2722610 + 2722611.

It is an arithmetic number, because the mean of its divisors is an integer number (2722611).

Almost surely, 2^5445221 is an apocalyptic number.

It is an amenable number.

5445221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5445221 is an equidigital number, since it uses as much as digits as its factorization.

5445221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1600, while the sum is 23.

The square root of 5445221 is about 2333.4997321620. The cubic root of 5445221 is about 175.9294332288.

The spelling of 5445221 in words is "five million, four hundred forty-five thousand, two hundred twenty-one".