320521363 has 8 divisors (see below), whose sum is σ = 322122240. Its totient is φ = 318925320.

The previous prime is 320521361. The next prime is 320521381. The reversal of 320521363 is 363125023.

It is a happy number.

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 320521363 - 2¹ = 320521361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320521361) 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 7 ways as a sum of consecutive naturals, for example, 214806 + ... + 216292.

It is an arithmetic number, because the mean of its divisors is an integer number (40265280).

Almost surely, 2^320521363 is an apocalyptic number.

320521363 is a deficient number, since it is larger than the sum of its proper divisors (1600877).

320521363 is a wasteful number, since it uses less digits than its factorization.

320521363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 320521363 is about 17903.1104280793. The cubic root of 320521363 is about 684.3616430273.

Adding to 320521363 its reverse (363125023), we get a palindrome (683646386).

The spelling of 320521363 in words is "three hundred twenty million, five hundred twenty-one thousand, three hundred sixty-three".