231220301324320 has 288 divisors, whose sum is σ = 693251218731456. Its totient is φ = 72064429516800.

The previous prime is 231220301324279. The next prime is 231220301324381. The reversal of 231220301324320 is 23423103022132.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1673245630 + ... + 1673383810.

It is an arithmetic number, because the mean of its divisors is an integer number (2407122287262).

Almost surely, 2^{231220301324320} is an apocalyptic number.

231220301324320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231220301324320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346625609365728).

231220301324320 is an abundant number, since it is smaller than the sum of its proper divisors (462030917407136).

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

231220301324320 is a wasteful number, since it uses less digits than its factorization.

231220301324320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157624 (or 157609 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 231220301324320 its reverse (23423103022132), we get a palindrome (254643404346452).

The spelling of 231220301324320 in words is "two hundred thirty-one trillion, two hundred twenty billion, three hundred one million, three hundred twenty-four thousand, three hundred twenty".