4524520021 has 8 divisors (see below), whose sum is σ = 5173323584. Its totient is φ = 3876327360.

The previous prime is 4524520009. The next prime is 4524520031. The reversal of 4524520021 is 1200254254.

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

It is a cyclic number.

It is not a de Polignac number, because 4524520021 - 2⁹ = 4524519509 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 (4524520031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136740 + ... + 166573.

It is an arithmetic number, because the mean of its divisors is an integer number (646665448).

Almost surely, 2^4524520021 is an apocalyptic number.

It is an amenable number.

4524520021 is a deficient number, since it is larger than the sum of its proper divisors (648803563).

4524520021 is a wasteful number, since it uses less digits than its factorization.

4524520021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305451.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 4524520021 is about 67264.5524849456. The cubic root of 4524520021 is about 1653.9568361330.

Adding to 4524520021 its reverse (1200254254), we get a palindrome (5724774275).

The spelling of 4524520021 in words is "four billion, five hundred twenty-four million, five hundred twenty thousand, twenty-one".