321994210452 has 96 divisors (see below), whose sum is σ = 797057318400. Its totient is φ = 100888094592.

The previous prime is 321994210397. The next prime is 321994210459. The reversal of 321994210452 is 254012499123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321994210459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22997518 + ... + 23011514.

It is an arithmetic number, because the mean of its divisors is an integer number (8302680400).

Almost surely, 2^321994210452 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 321994210452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398528659200).

321994210452 is an abundant number, since it is smaller than the sum of its proper divisors (475063107948).

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

321994210452 is a wasteful number, since it uses less digits than its factorization.

321994210452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14805 (or 14803 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 321994210452 in words is "three hundred twenty-one billion, nine hundred ninety-four million, two hundred ten thousand, four hundred fifty-two".