45545210221 has 16 divisors (see below), whose sum is σ = 55648629504. Its totient is φ = 36385622784.

The previous prime is 45545210173. The next prime is 45545210257. The reversal of 45545210221 is 12201254554.

45545210221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45545210221 - 2¹³ = 45545202029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45545210521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1845670 + ... + 1870183.

It is an arithmetic number, because the mean of its divisors is an integer number (3478039344).

Almost surely, 2^45545210221 is an apocalyptic number.

It is an amenable number.

45545210221 is a deficient number, since it is larger than the sum of its proper divisors (10103419283).

45545210221 is a wasteful number, since it uses less digits than its factorization.

45545210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715980.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 45545210221 its reverse (12201254554), we get a palindrome (57746464775).

The spelling of 45545210221 in words is "forty-five billion, five hundred forty-five million, two hundred ten thousand, two hundred twenty-one".