320041521 has 6 divisors (see below), whose sum is σ = 462282210. Its totient is φ = 213361008.

The previous prime is 320041511. The next prime is 320041537. The reversal of 320041521 is 125140023.

It can be written as a sum of positive squares in only one way, i.e., 301508496 + 18533025 = 17364^2 + 4305^2 .

It is a de Polignac number, because none of the positive numbers 2^k-320041521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320041494 and 320041503.

It is not an unprimeable number, because it can be changed into a prime (320041511) 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 5 ways as a sum of consecutive naturals, for example, 17780076 + ... + 17780093.

It is an arithmetic number, because the mean of its divisors is an integer number (77047035).

Almost surely, 2^320041521 is an apocalyptic number.

It is an amenable number.

320041521 is a deficient number, since it is larger than the sum of its proper divisors (142240689).

320041521 is a wasteful number, since it uses less digits than its factorization.

320041521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35560175 (or 35560172 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 320041521 is about 17889.7043295858. The cubic root of 320041521 is about 684.0199606876.

Adding to 320041521 its reverse (125140023), we get a palindrome (445181544).

The spelling of 320041521 in words is "three hundred twenty million, forty-one thousand, five hundred twenty-one".