231310130220 has 576 divisors, whose sum is σ = 829382561280. Its totient is φ = 53644695552.

The previous prime is 231310130189. The next prime is 231310130221. The reversal of 231310130220 is 22031013132.

231310130220 is a `hidden beast` number, since 2 + 3 + 1 + 310 + 130 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231310130193 and 231310130202.

It is not an unprimeable number, because it can be changed into a prime (231310130221) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 279697447 + ... + 279698273.

It is an arithmetic number, because the mean of its divisors is an integer number (1439900280).

Almost surely, 2^231310130220 is an apocalyptic number.

231310130220 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 231310130220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (414691280640).

231310130220 is an abundant number, since it is smaller than the sum of its proper divisors (598072431060).

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

231310130220 is a wasteful number, since it uses less digits than its factorization.

231310130220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231310130220 its reverse (22031013132), we get a palindrome (253341143352).

The spelling of 231310130220 in words is "two hundred thirty-one billion, three hundred ten million, one hundred thirty thousand, two hundred twenty".