321875216 has 20 divisors (see below), whose sum is σ = 671605452. Its totient is φ = 148557696.

The previous prime is 321875207. The next prime is 321875221. The reversal of 321875216 is 612578123.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 201753616 + 120121600 = 14204^2 + 10960^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773531 + ... + 773946.

Almost surely, 2^321875216 is an apocalyptic number.

It is an amenable number.

321875216 is an abundant number, since it is smaller than the sum of its proper divisors (349730236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321875216 is a wasteful number, since it uses less digits than its factorization.

321875216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547498 (or 1547492 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 321875216 is about 17940.8811377814. The cubic root of 321875216 is about 685.3238499229.

The spelling of 321875216 in words is "three hundred twenty-one million, eight hundred seventy-five thousand, two hundred sixteen".