231302223220 has 12 divisors (see below), whose sum is σ = 485734668804. Its totient is φ = 92520889280.

The previous prime is 231302223151. The next prime is 231302223241. The reversal of 231302223220 is 22322203132.

It can be written as a sum of positive squares in 2 ways, for example, as 66066477156 + 165235746064 = 257034^2 + 406492^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231302223191 and 231302223200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5782555561 + ... + 5782555600.

It is an arithmetic number, because the mean of its divisors is an integer number (40477889067).

Almost surely, 2^231302223220 is an apocalyptic number.

231302223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231302223220 is an abundant number, since it is smaller than the sum of its proper divisors (254432445584).

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

231302223220 is a wasteful number, since it uses less digits than its factorization.

231302223220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11565111170 (or 11565111168 counting only the distinct ones).

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

Adding to 231302223220 its reverse (22322203132), we get a palindrome (253624426352).

The spelling of 231302223220 in words is "two hundred thirty-one billion, three hundred two million, two hundred twenty-three thousand, two hundred twenty".