5131243142440 has 64 divisors (see below), whose sum is σ = 11842221402000. Its totient is φ = 2000328099840.

The previous prime is 5131243142327. The next prime is 5131243142489. The reversal of 5131243142440 is 442413421315.

It can be written as a sum of positive squares in 8 ways, for example, as 2341628336644 + 2789614805796 = 1530238^2 + 1670214^2 .

It is a super-2 number, since 2×5131243142440² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5131243142396 and 5131243142405.

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 15 ways as a sum of consecutive naturals, for example, 9380685 + ... + 9912604.

Almost surely, 2^{5131243142440} is an apocalyptic number.

It is an amenable number.

5131243142440 is an abundant number, since it is smaller than the sum of its proper divisors (6710978259560).

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

5131243142440 is a wasteful number, since it uses less digits than its factorization.

5131243142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19293470 (or 19293466 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 5131243142440 its reverse (442413421315), we get a palindrome (5573656563755).

The spelling of 5131243142440 in words is "five trillion, one hundred thirty-one billion, two hundred forty-three million, one hundred forty-two thousand, four hundred forty".