231421040420 has 48 divisors (see below), whose sum is σ = 497979337968. Its totient is φ = 90284912640.

The previous prime is 231421040363. The next prime is 231421040453. The reversal of 231421040420 is 24040124132.

231421040420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 57558727396 + 173862313024 = 239914^2 + 416968^2 .

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 15 ways as a sum of consecutive naturals, for example, 2976764 + ... + 3053516.

It is an arithmetic number, because the mean of its divisors is an integer number (10374569541).

Almost surely, 2^231421040420 is an apocalyptic number.

231421040420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231421040420 is an abundant number, since it is smaller than the sum of its proper divisors (266558297548).

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

231421040420 is a wasteful number, since it uses less digits than its factorization.

231421040420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80480 (or 80478 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 231421040420 its reverse (24040124132), we get a palindrome (255461164552).

The spelling of 231421040420 in words is "two hundred thirty-one billion, four hundred twenty-one million, forty thousand, four hundred twenty".