243131442020 has 12 divisors (see below), whose sum is σ = 510576028284. Its totient is φ = 97252576800.

The previous prime is 243131442013. The next prime is 243131442067. The reversal of 243131442020 is 20244131342.

243131442020 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 2 ways, for example, as 157742420224 + 85389021796 = 397168^2 + 292214^2 .

It is a super-2 number, since 2×243131442020² (a number of 24 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 6078286031 + ... + 6078286070.

It is an arithmetic number, because the mean of its divisors is an integer number (42548002357).

Almost surely, 2^243131442020 is an apocalyptic number.

243131442020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243131442020 is an abundant number, since it is smaller than the sum of its proper divisors (267444586264).

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

243131442020 is a wasteful number, since it uses less digits than its factorization.

243131442020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12156572110 (or 12156572108 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 243131442020 its reverse (20244131342), we get a palindrome (263375573362).

The spelling of 243131442020 in words is "two hundred forty-three billion, one hundred thirty-one million, four hundred forty-two thousand, twenty".