243400124131 has 12 divisors (see below), whose sum is σ = 257129715864. Its totient is φ = 230369832000.

The previous prime is 243400124089. The next prime is 243400124153. The reversal of 243400124131 is 131421004342.

It is a de Polignac number, because none of the positive numbers 2^k-243400124131 is a prime.

It is a super-2 number, since 2×243400124131² (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 = 243400124096 and 243400124105.

It is not an unprimeable number, because it can be changed into a prime (243403124131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58651 + ... + 700171.

It is an arithmetic number, because the mean of its divisors is an integer number (21427476322).

Almost surely, 2^243400124131 is an apocalyptic number.

243400124131 is a deficient number, since it is larger than the sum of its proper divisors (13729591733).

243400124131 is a wasteful number, since it uses less digits than its factorization.

243400124131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642610 (or 642591 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 243400124131 its reverse (131421004342), we get a palindrome (374821128473).

The spelling of 243400124131 in words is "two hundred forty-three billion, four hundred million, one hundred twenty-four thousand, one hundred thirty-one".