243203131404 has 36 divisors (see below), whose sum is σ = 635962214160. Its totient is φ = 78272271840.

The previous prime is 243203131403. The next prime is 243203131463. The reversal of 243203131404 is 404131302342.

243203131404 is a `hidden beast` number, since 2 + 43 + 203 + 13 + 1 + 404 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×243203131404² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243203131403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116475552 + ... + 116477639.

It is an arithmetic number, because the mean of its divisors is an integer number (17665617060).

Almost surely, 2^243203131404 is an apocalyptic number.

It is an amenable number.

243203131404 is an abundant number, since it is smaller than the sum of its proper divisors (392759082756).

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

243203131404 is a wasteful number, since it uses less digits than its factorization.

243203131404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232953230 (or 232953225 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 243203131404 its reverse (404131302342), we get a palindrome (647334433746).

The spelling of 243203131404 in words is "two hundred forty-three billion, two hundred three million, one hundred thirty-one thousand, four hundred four".