321422424444 has 144 divisors (see below), whose sum is σ = 896747604480. Its totient is φ = 96262110720.

The previous prime is 321422424443. The next prime is 321422424469. The reversal of 321422424444 is 444424224123.

321422424444 is a `hidden beast` number, since 32 + 142 + 2 + 42 + 4 + 444 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 321422424399 and 321422424408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321422424443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18338317 + ... + 18355835.

It is an arithmetic number, because the mean of its divisors is an integer number (6227413920).

Almost surely, 2^321422424444 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 321422424444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448373802240).

321422424444 is an abundant number, since it is smaller than the sum of its proper divisors (575325180036).

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

321422424444 is a wasteful number, since it uses less digits than its factorization.

321422424444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18080 (or 18075 counting only the distinct ones).

The product of its digits is 196608, while the sum is 36.

Adding to 321422424444 its reverse (444424224123), we get a palindrome (765846648567).

The spelling of 321422424444 in words is "three hundred twenty-one billion, four hundred twenty-two million, four hundred twenty-four thousand, four hundred forty-four".