320425513 has 8 divisors (see below), whose sum is σ = 330031368. Its totient is φ = 310869504.

The previous prime is 320425507. The next prime is 320425531. The reversal of 320425513 is 315524023.

It can be written as a sum of positive squares in 4 ways, for example, as 19333609 + 301091904 = 4397^2 + 17352^2 .

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 320425513 - 2¹⁷ = 320294441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320425813) 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, 795 + ... + 25327.

It is an arithmetic number, because the mean of its divisors is an integer number (41253921).

Almost surely, 2^320425513 is an apocalyptic number.

It is an amenable number.

320425513 is a deficient number, since it is larger than the sum of its proper divisors (9605855).

320425513 is a wasteful number, since it uses less digits than its factorization.

320425513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24923.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 320425513 is about 17900.4333187775. The cubic root of 320425513 is about 684.2934181382.

Adding to 320425513 its reverse (315524023), we get a palindrome (635949536).

The spelling of 320425513 in words is "three hundred twenty million, four hundred twenty-five thousand, five hundred thirteen".