321377056 has 192 divisors, whose sum is σ = 867041280. Its totient is φ = 113218560.

The previous prime is 321377047. The next prime is 321377081. The reversal of 321377056 is 650773123.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2530465 + ... + 2530591.

It is an arithmetic number, because the mean of its divisors is an integer number (4515840).

Almost surely, 2^321377056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321377056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433520640).

321377056 is an abundant number, since it is smaller than the sum of its proper divisors (545664224).

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

321377056 is a wasteful number, since it uses less digits than its factorization.

321377056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 321377056 is about 17926.9923857852. The cubic root of 321377056 is about 684.9701132466.

It can be divided in two parts, 32137 and 7056, that added together give a palindrome (39193).

The spelling of 321377056 in words is "three hundred twenty-one million, three hundred seventy-seven thousand, fifty-six".