320421222 has 48 divisors (see below), whose sum is σ = 762512400. Its totient is φ = 96436800.

The previous prime is 320421181. The next prime is 320421229. The reversal of 320421222 is 222124023.

320421222 is a `hidden beast` number, since 3 + 20 + 421 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 320421195 and 320421204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320421229) 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, 24072 + ... + 34932.

It is an arithmetic number, because the mean of its divisors is an integer number (15885675).

Almost surely, 2^320421222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320421222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381256200).

320421222 is an abundant number, since it is smaller than the sum of its proper divisors (442091178).

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

320421222 is a wasteful number, since it uses less digits than its factorization.

320421222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11029 (or 11026 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 320421222 is about 17900.3134609425. The cubic root of 320421222 is about 684.2903635373.

Adding to 320421222 its reverse (222124023), we get a palindrome (542545245).

The spelling of 320421222 in words is "three hundred twenty million, four hundred twenty-one thousand, two hundred twenty-two".