45305221 has 16 divisors (see below), whose sum is σ = 53449200. Its totient is φ = 37997568.

The previous prime is 45305209. The next prime is 45305231. The reversal of 45305221 is 12250354.

45305221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 562500 + 44742721 = 750^2 + 6689^2 .

It is a cyclic number.

It is not a de Polignac number, because 45305221 - 2⁷ = 45305093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45305192 and 45305201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45305201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2875 + ... + 9943.

It is an arithmetic number, because the mean of its divisors is an integer number (3340575).

Almost surely, 2^45305221 is an apocalyptic number.

It is an amenable number.

45305221 is a deficient number, since it is larger than the sum of its proper divisors (8143979).

45305221 is a wasteful number, since it uses less digits than its factorization.

45305221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 45305221 is about 6730.9153166564. The cubic root of 45305221 is about 356.4916957990.

Adding to 45305221 its reverse (12250354), we get a palindrome (57555575).

The spelling of 45305221 in words is "forty-five million, three hundred five thousand, two hundred twenty-one".