231424220 has 24 divisors (see below), whose sum is σ = 487849824. Its totient is φ = 92215616.

The previous prime is 231424187. The next prime is 231424243. The reversal of 231424220 is 22424132.

231424220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 231424192 and 231424201.

It is a congruent number.

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, 16739 + ... + 27258.

It is an arithmetic number, because the mean of its divisors is an integer number (20327076).

Almost surely, 2^231424220 is an apocalyptic number.

231424220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231424220 is an abundant number, since it is smaller than the sum of its proper divisors (256425604).

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

231424220 is a wasteful number, since it uses less digits than its factorization.

231424220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44269 (or 44267 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 231424220 is about 15212.6335655599. The cubic root of 231424220 is about 613.9546168538.

Adding to 231424220 its reverse (22424132), we get a palindrome (253848352).

The spelling of 231424220 in words is "two hundred thirty-one million, four hundred twenty-four thousand, two hundred twenty".