320431221434 has 64 divisors (see below), whose sum is σ = 513435746304. Its totient is φ = 149869872000.

The previous prime is 320431221433. The next prime is 320431221479. The reversal of 320431221434 is 434122134023.

It is a junction number, because it is equal to n+sod(n) for n = 320431221397 and 320431221406.

It is not an unprimeable number, because it can be changed into a prime (320431221433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 421065614 + ... + 421066374.

It is an arithmetic number, because the mean of its divisors is an integer number (8022433536).

Almost surely, 2^320431221434 is an apocalyptic number.

320431221434 is a deficient number, since it is larger than the sum of its proper divisors (193004524870).

320431221434 is an equidigital number, since it uses as much as digits as its factorization.

320431221434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1022 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 320431221434 its reverse (434122134023), we get a palindrome (754553355457).

The spelling of 320431221434 in words is "three hundred twenty billion, four hundred thirty-one million, two hundred twenty-one thousand, four hundred thirty-four".