243150431021 has 16 divisors (see below), whose sum is σ = 254170103808. Its totient is φ = 232346847600.

The previous prime is 243150430961. The next prime is 243150431039. The reversal of 243150431021 is 120134051342.

It is a happy number.

243150431021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-243150431021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243150431081) by changing a digit.

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, 684356 + ... + 977058.

It is an arithmetic number, because the mean of its divisors is an integer number (15885631488).

Almost surely, 2^243150431021 is an apocalyptic number.

It is an amenable number.

243150431021 is a deficient number, since it is larger than the sum of its proper divisors (11019672787).

243150431021 is a wasteful number, since it uses less digits than its factorization.

243150431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293072.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 243150431021 its reverse (120134051342), we get a palindrome (363284482363).

The spelling of 243150431021 in words is "two hundred forty-three billion, one hundred fifty million, four hundred thirty-one thousand, twenty-one".