321055252 has 72 divisors (see below), whose sum is σ = 687173760. Its totient is φ = 130616640.

The previous prime is 321055247. The next prime is 321055271. The reversal of 321055252 is 252550123.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1032177 + ... + 1032487.

It is an arithmetic number, because the mean of its divisors is an integer number (9544080).

Almost surely, 2^321055252 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 321055252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343586880).

321055252 is an abundant number, since it is smaller than the sum of its proper divisors (366118508).

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

321055252 is a wasteful number, since it uses less digits than its factorization.

321055252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 321055252 is about 17918.0147337812. The cubic root of 321055252 is about 684.7414101992.

The spelling of 321055252 in words is "three hundred twenty-one million, fifty-five thousand, two hundred fifty-two".