243131533515152 has 80 divisors (see below), whose sum is σ = 499357235341440. Its totient is φ = 114281831245824.

The previous prime is 243131533515151. The next prime is 243131533515179. The reversal of 243131533515152 is 251515335131342.

It is a super-2 number, since 2×243131533515152² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243131533515151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1310398613 + ... + 1310584139.

It is an arithmetic number, because the mean of its divisors is an integer number (6241965441768).

Almost surely, 2^{243131533515152} is an apocalyptic number.

It is an amenable number.

243131533515152 is an abundant number, since it is smaller than the sum of its proper divisors (256225701826288).

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

243131533515152 is a wasteful number, since it uses less digits than its factorization.

243131533515152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191128 (or 191122 counting only the distinct ones).

The product of its digits is 810000, while the sum is 44.

Adding to 243131533515152 its reverse (251515335131342), we get a palindrome (494646868646494).

The spelling of 243131533515152 in words is "two hundred forty-three trillion, one hundred thirty-one billion, five hundred thirty-three million, five hundred fifteen thousand, one hundred fifty-two".