4045113521 has 2 divisors, whose sum is σ = 4045113522. Its totient is φ = 4045113520.

The previous prime is 4045113511. The next prime is 4045113533. The reversal of 4045113521 is 1253115404.

4045113521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2121063025 + 1924050496 = 46055^2 + 43864^2 .

It is a cyclic number.

It is not a de Polignac number, because 4045113521 - 2¹⁰ = 4045112497 is a prime.

It is not a weakly prime, because it can be changed into another prime (4045113511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022556760 + 2022556761.

It is an arithmetic number, because the mean of its divisors is an integer number (2022556761).

Almost surely, 2^4045113521 is an apocalyptic number.

It is an amenable number.

4045113521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4045113521 is an equidigital number, since it uses as much as digits as its factorization.

4045113521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 4045113521 is about 63601.2069146490. The cubic root of 4045113521 is about 1593.3465267908.

Adding to 4045113521 its reverse (1253115404), we get a palindrome (5298228925).

The spelling of 4045113521 in words is "four billion, forty-five million, one hundred thirteen thousand, five hundred twenty-one".