320216521285 has 8 divisors (see below), whose sum is σ = 384277402656. Its totient is φ = 256161498960.

The previous prime is 320216521271. The next prime is 320216521343. The reversal of 320216521285 is 582125612023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320216521285 - 2⁵ = 320216521253 is a prime.

It is a super-3 number, since 3×320216521285³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1343611 + ... + 1563880.

It is an arithmetic number, because the mean of its divisors is an integer number (48034675332).

Almost surely, 2^320216521285 is an apocalyptic number.

It is an amenable number.

320216521285 is a deficient number, since it is larger than the sum of its proper divisors (64060881371).

320216521285 is a wasteful number, since it uses less digits than its factorization.

320216521285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929523.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 320216521285 in words is "three hundred twenty billion, two hundred sixteen million, five hundred twenty-one thousand, two hundred eighty-five".