4021520563 has 8 divisors (see below), whose sum is σ = 4234737600. Its totient is φ = 3808459368.

The previous prime is 4021520557. The next prime is 4021520599. The reversal of 4021520563 is 3650251204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021520563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021523563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16020 + ... + 91102.

It is an arithmetic number, because the mean of its divisors is an integer number (529342200).

Almost surely, 2^4021520563 is an apocalyptic number.

4021520563 is a deficient number, since it is larger than the sum of its proper divisors (213217037).

4021520563 is a wasteful number, since it uses less digits than its factorization.

4021520563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77921.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 4021520563 is about 63415.4599683705. The cubic root of 4021520563 is about 1590.2427754496.

Adding to 4021520563 its reverse (3650251204), we get a palindrome (7671771767).

The spelling of 4021520563 in words is "four billion, twenty-one million, five hundred twenty thousand, five hundred sixty-three".