320521252 has 12 divisors (see below), whose sum is σ = 564155676. Its totient is φ = 159333920.

The previous prime is 320521219. The next prime is 320521277. The reversal of 320521252 is 252125023.

It can be written as a sum of positive squares in 2 ways, for example, as 270734116 + 49787136 = 16454^2 + 7056^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230899 + ... + 232282.

It is an arithmetic number, because the mean of its divisors is an integer number (47012973).

Almost surely, 2^320521252 is an apocalyptic number.

It is an amenable number.

320521252 is a deficient number, since it is larger than the sum of its proper divisors (243634424).

320521252 is a wasteful number, since it uses less digits than its factorization.

320521252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463358 (or 463356 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 320521252 is about 17903.1073280590. The cubic root of 320521252 is about 684.3615640267.

Adding to 320521252 its reverse (252125023), we get a palindrome (572646275).

The spelling of 320521252 in words is "three hundred twenty million, five hundred twenty-one thousand, two hundred fifty-two".