320341521 has 8 divisors (see below), whose sum is σ = 427215744. Its totient is φ = 213514160.

The previous prime is 320341513. The next prime is 320341531. The reversal of 320341521 is 125143023.

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 320341521 - 2³ = 320341513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320341531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9976 + ... + 27206.

It is an arithmetic number, because the mean of its divisors is an integer number (53401968).

Almost surely, 2^320341521 is an apocalyptic number.

It is an amenable number.

320341521 is a deficient number, since it is larger than the sum of its proper divisors (106874223).

320341521 is a wasteful number, since it uses less digits than its factorization.

320341521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23431.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 320341521 is about 17898.0870765565. The cubic root of 320341521 is about 684.2336224467.

Adding to 320341521 its reverse (125143023), we get a palindrome (445484544).

The spelling of 320341521 in words is "three hundred twenty million, three hundred forty-one thousand, five hundred twenty-one".