321421224 has 16 divisors (see below), whose sum is σ = 803553120. Its totient is φ = 107140400.

The previous prime is 321421223. The next prime is 321421229. The reversal of 321421224 is 422124123.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 321421224.

It is not an unprimeable number, because it can be changed into a prime (321421223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6696252 + ... + 6696299.

It is an arithmetic number, because the mean of its divisors is an integer number (50222070).

Almost surely, 2^321421224 is an apocalyptic number.

It is an amenable number.

321421224 is an abundant number, since it is smaller than the sum of its proper divisors (482131896).

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

321421224 is a wasteful number, since it uses less digits than its factorization.

321421224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13392560 (or 13392556 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 321421224 is about 17928.2242288521. The cubic root of 321421224 is about 685.0014911080.

Adding to 321421224 its reverse (422124123), we get a palindrome (743545347).

The spelling of 321421224 in words is "three hundred twenty-one million, four hundred twenty-one thousand, two hundred twenty-four".