231310313220 has 192 divisors, whose sum is σ = 772696350720. Its totient is φ = 50551176192.

The previous prime is 231310313203. The next prime is 231310313233. The reversal of 231310313220 is 22313013132.

231310313220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231310313220² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39342241 + ... + 39348119.

It is an arithmetic number, because the mean of its divisors is an integer number (4024460160).

Almost surely, 2^231310313220 is an apocalyptic number.

231310313220 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 231310313220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386348175360).

231310313220 is an abundant number, since it is smaller than the sum of its proper divisors (541386037500).

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

231310313220 is a wasteful number, since it uses less digits than its factorization.

231310313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9994 (or 9992 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 231310313220 its reverse (22313013132), we get a palindrome (253623326352).

The spelling of 231310313220 in words is "two hundred thirty-one billion, three hundred ten million, three hundred thirteen thousand, two hundred twenty".