321445452 has 72 divisors (see below), whose sum is σ = 810774720. Its totient is φ = 99073280.

The previous prime is 321445433. The next prime is 321445457. The reversal of 321445452 is 254544123.

It is a super-2 number, since 2×321445452² = 206654357222968608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321445457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203827 + ... + 205397.

It is an arithmetic number, because the mean of its divisors is an integer number (11260760).

Almost surely, 2^321445452 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 321445452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405387360).

321445452 is an abundant number, since it is smaller than the sum of its proper divisors (489329268).

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

321445452 is a wasteful number, since it uses less digits than its factorization.

321445452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671 (or 1652 counting only the distinct ones).

The product of its digits is 19200, while the sum is 30.

The square root of 321445452 is about 17928.8999104797. The cubic root of 321445452 is about 685.0187019598.

Adding to 321445452 its reverse (254544123), we get a palindrome (575989575).

The spelling of 321445452 in words is "three hundred twenty-one million, four hundred forty-five thousand, four hundred fifty-two".