231010232220 has 144 divisors (see below), whose sum is σ = 731750423040. Its totient is φ = 58879801728.

The previous prime is 231010232209. The next prime is 231010232239. The reversal of 231010232220 is 22232010132.

231010232220 is a `hidden beast` number, since 2 + 310 + 10 + 2 + 322 + 20 = 666.

231010232220 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-3 number, since 3×231010232220³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 = 231010232193 and 231010232202.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 5638971 + ... + 5679789.

It is an arithmetic number, because the mean of its divisors is an integer number (5081600160).

Almost surely, 2^231010232220 is an apocalyptic number.

231010232220 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 231010232220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365875211520).

231010232220 is an abundant number, since it is smaller than the sum of its proper divisors (500740190820).

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

231010232220 is a wasteful number, since it uses less digits than its factorization.

231010232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42224 (or 42219 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231010232220 its reverse (22232010132), we get a palindrome (253242242352).

The spelling of 231010232220 in words is "two hundred thirty-one billion, ten million, two hundred thirty-two thousand, two hundred twenty".