243240124131 has 6 divisors (see below), whose sum is σ = 351346845980. Its totient is φ = 162160082748.

The previous prime is 243240124117. The next prime is 243240124151. The reversal of 243240124131 is 131421042342.

243240124131 is a `hidden beast` number, since 2 + 4 + 3 + 240 + 1 + 2 + 413 + 1 = 666.

It is not a de Polignac number, because 243240124131 - 2⁹ = 243240123619 is a prime.

It is a super-2 number, since 2×243240124131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243240124095 and 243240124104.

It is not an unprimeable number, because it can be changed into a prime (243240124151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13513340221 + ... + 13513340238.

Almost surely, 2^243240124131 is an apocalyptic number.

243240124131 is a deficient number, since it is larger than the sum of its proper divisors (108106721849).

243240124131 is a wasteful number, since it uses less digits than its factorization.

243240124131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27026680465 (or 27026680462 counting only the distinct ones).

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

Adding to 243240124131 its reverse (131421042342), we get a palindrome (374661166473).

The spelling of 243240124131 in words is "two hundred forty-three billion, two hundred forty million, one hundred twenty-four thousand, one hundred thirty-one".