231302223020 has 72 divisors (see below), whose sum is σ = 539193476304. Its totient is φ = 83277040000.

The previous prime is 231302223017. The next prime is 231302223029. The reversal of 231302223020 is 20322203132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 231302222983 and 231302223001.

It is not an unprimeable number, because it can be changed into a prime (231302223029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228746 + ... + 717585.

It is an arithmetic number, because the mean of its divisors is an integer number (7488798282).

Almost surely, 2^231302223020 is an apocalyptic number.

231302223020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231302223020 is an abundant number, since it is smaller than the sum of its proper divisors (307891253284).

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

231302223020 is a wasteful number, since it uses less digits than its factorization.

231302223020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946463 (or 946450 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 231302223020 its reverse (20322203132), we get a palindrome (251624426152).

The spelling of 231302223020 in words is "two hundred thirty-one billion, three hundred two million, two hundred twenty-three thousand, twenty".