231010220 has 48 divisors (see below), whose sum is σ = 561469440. Its totient is φ = 78197184.

The previous prime is 231010103. The next prime is 231010223. The reversal of 231010220 is 22010132.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (231010223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617 + ... + 21503.

It is an arithmetic number, because the mean of its divisors is an integer number (11697280).

Almost surely, 2^231010220 is an apocalyptic number.

231010220 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 231010220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280734720).

231010220 is an abundant number, since it is smaller than the sum of its proper divisors (330459220).

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

231010220 is a wasteful number, since it uses less digits than its factorization.

231010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20982 (or 20980 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 231010220 is about 15199.0203631681. The cubic root of 231010220 is about 613.5882925772.

Adding to 231010220 its reverse (22010132), we get a palindrome (253020352).

The spelling of 231010220 in words is "two hundred thirty-one million, ten thousand, two hundred twenty".