4531521520 has 20 divisors (see below), whose sum is σ = 10535787720. Its totient is φ = 1812608576.

The previous prime is 4531521517. The next prime is 4531521521. The reversal of 4531521520 is 251251354.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×4531521520² = 41069374572446220800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4531521521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28321930 + ... + 28322089.

It is an arithmetic number, because the mean of its divisors is an integer number (526789386).

Almost surely, 2^4531521520 is an apocalyptic number.

4531521520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4531521520 is an abundant number, since it is smaller than the sum of its proper divisors (6004266200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4531521520 is a wasteful number, since it uses less digits than its factorization.

4531521520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56644032 (or 56644026 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 4531521520 is about 67316.5768588986. The cubic root of 4531521520 is about 1654.8095386617.

Adding to 4531521520 its reverse (251251354), we get a palindrome (4782772874).

The spelling of 4531521520 in words is "four billion, five hundred thirty-one million, five hundred twenty-one thousand, five hundred twenty".