231241220 has 24 divisors (see below), whose sum is σ = 554979264. Its totient is φ = 79282656.

The previous prime is 231241207. The next prime is 231241247. The reversal of 231241220 is 22142132.

231241220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825722 + ... + 826001.

It is an arithmetic number, because the mean of its divisors is an integer number (23124136).

Almost surely, 2^231241220 is an apocalyptic number.

231241220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231241220 is an abundant number, since it is smaller than the sum of its proper divisors (323738044).

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

231241220 is a wasteful number, since it uses less digits than its factorization.

231241220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651739 (or 1651737 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 231241220 is about 15206.6176383836. The cubic root of 231241220 is about 613.7927448269.

Adding to 231241220 its reverse (22142132), we get a palindrome (253383352).

The spelling of 231241220 in words is "two hundred thirty-one million, two hundred forty-one thousand, two hundred twenty".