4521565321 has 32 divisors (see below), whose sum is σ = 5720214528. Its totient is φ = 3478325760.

The previous prime is 4521565313. The next prime is 4521565343. The reversal of 4521565321 is 1235651254.

It is not a de Polignac number, because 4521565321 - 2³ = 4521565313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4521565381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1180816 + ... + 1184638.

It is an arithmetic number, because the mean of its divisors is an integer number (178756704).

Almost surely, 2^4521565321 is an apocalyptic number.

4521565321 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4521565321 is a deficient number, since it is larger than the sum of its proper divisors (1198649207).

4521565321 is a wasteful number, since it uses less digits than its factorization.

4521565321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201.

The product of its digits is 36000, while the sum is 34.

The square root of 4521565321 is about 67242.5856210185. The cubic root of 4521565321 is about 1653.5967235008.

The spelling of 4521565321 in words is "four billion, five hundred twenty-one million, five hundred sixty-five thousand, three hundred twenty-one".