321212416 has 104 divisors (see below), whose sum is σ = 778472640. Its totient is φ = 129368064.

The previous prime is 321212413. The next prime is 321212417. The reversal of 321212416 is 614212123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321212413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487095 + ... + 487753.

Almost surely, 2^321212416 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 321212416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389236320).

321212416 is an abundant number, since it is smaller than the sum of its proper divisors (457260224).

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

321212416 is an equidigital number, since it uses as much as digits as its factorization.

321212416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 685 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 321212416 is about 17922.3998393072. The cubic root of 321212416 is about 684.8531242451.

Adding to 321212416 its reverse (614212123), we get a palindrome (935424539).

The spelling of 321212416 in words is "three hundred twenty-one million, two hundred twelve thousand, four hundred sixteen".