320430231220 has 24 divisors (see below), whose sum is σ = 734076530208. Its totient is φ = 116520084000.

The previous prime is 320430231211. The next prime is 320430231223. The reversal of 320430231220 is 22132034023.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 320430231191 and 320430231200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320430231223) 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, 728250306 + ... + 728250745.

It is an arithmetic number, because the mean of its divisors is an integer number (30586522092).

Almost surely, 2^320430231220 is an apocalyptic number.

It is an amenable number.

320430231220 is an abundant number, since it is smaller than the sum of its proper divisors (413646298988).

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

320430231220 is a wasteful number, since it uses less digits than its factorization.

320430231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456501071 (or 1456501069 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 320430231220 its reverse (22132034023), we get a palindrome (342562265243).

The spelling of 320430231220 in words is "three hundred twenty billion, four hundred thirty million, two hundred thirty-one thousand, two hundred twenty".