243131442012 has 72 divisors (see below), whose sum is σ = 635878588800. Its totient is φ = 78236419968.

The previous prime is 243131441999. The next prime is 243131442013. The reversal of 243131442012 is 210244131342.

243131442012 is a `hidden beast` number, since 2 + 4 + 313 + 144 + 201 + 2 = 666.

It is a super-2 number, since 2×243131442012² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243131442013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7991253 + ... + 8021619.

Almost surely, 2^243131442012 is an apocalyptic number.

It is an amenable number.

243131442012 is an abundant number, since it is smaller than the sum of its proper divisors (392747146788).

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

243131442012 is a wasteful number, since it uses less digits than its factorization.

243131442012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38075 (or 38070 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 243131442012 its reverse (210244131342), we get a palindrome (453375573354).

The spelling of 243131442012 in words is "two hundred forty-three billion, one hundred thirty-one million, four hundred forty-two thousand, twelve".