231244332220 has 24 divisors (see below), whose sum is σ = 529759743408. Its totient is φ = 84088848000.

The previous prime is 231244332211. The next prime is 231244332227. The reversal of 231244332220 is 22233442132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231244332227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525555081 + ... + 525555520.

It is an arithmetic number, because the mean of its divisors is an integer number (22073322642).

Almost surely, 2^231244332220 is an apocalyptic number.

231244332220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231244332220 is an abundant number, since it is smaller than the sum of its proper divisors (298515411188).

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

231244332220 is a wasteful number, since it uses less digits than its factorization.

231244332220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051110621 (or 1051110619 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 231244332220 its reverse (22233442132), we get a palindrome (253477774352).

The spelling of 231244332220 in words is "two hundred thirty-one billion, two hundred forty-four million, three hundred thirty-two thousand, two hundred twenty".