4045520521 has 16 divisors (see below), whose sum is σ = 4675522176. Its totient is φ = 3428660736.

The previous prime is 4045520519. The next prime is 4045520569. The reversal of 4045520521 is 1250255404.

4045520521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 4045520521 - 2¹ = 4045520519 is a prime.

It is a super-2 number, since 2×4045520521² = 32732472571664222882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4045520521.

It is not an unprimeable number, because it can be changed into a prime (4045520621) 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, 412345 + ... + 422041.

It is an arithmetic number, because the mean of its divisors is an integer number (292220136).

Almost surely, 2^4045520521 is an apocalyptic number.

It is an amenable number.

4045520521 is a deficient number, since it is larger than the sum of its proper divisors (630001655).

4045520521 is a wasteful number, since it uses less digits than its factorization.

4045520521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10368.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 4045520521 is about 63604.4064589868. The cubic root of 4045520521 is about 1593.3999633041.

Adding to 4045520521 its reverse (1250255404), we get a palindrome (5295775925).

The spelling of 4045520521 in words is "four billion, forty-five million, five hundred twenty thousand, five hundred twenty-one".