243131132404 has 12 divisors (see below), whose sum is σ = 425492578084. Its totient is φ = 121561824384.

The previous prime is 243131132381. The next prime is 243131132441. The reversal of 243131132404 is 404231131342.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 135238591504 + 107892540900 = 367748^2 + 328470^2 .

It is a super-2 number, since 2×243131132404² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786627 + ... + 1051210.

Almost surely, 2^243131132404 is an apocalyptic number.

It is an amenable number.

243131132404 is a deficient number, since it is larger than the sum of its proper divisors (182361445680).

243131132404 is a wasteful number, since it uses less digits than its factorization.

243131132404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870914 (or 1870912 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 243131132404 its reverse (404231131342), we get a palindrome (647362263746).

The spelling of 243131132404 in words is "two hundred forty-three billion, one hundred thirty-one million, one hundred thirty-two thousand, four hundred four".