43131273512 has 64 divisors (see below), whose sum is σ = 86577938640. Its totient is φ = 20072448000.

The previous prime is 43131273511. The next prime is 43131273569. The reversal of 43131273512 is 21537213134.

It can be written as a sum of positive squares in 8 ways, for example, as 42260669476 + 870604036 = 205574^2 + 29506^2 .

It is not an unprimeable number, because it can be changed into a prime (43131273511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18144068 + ... + 18146444.

Almost surely, 2^43131273512 is an apocalyptic number.

It is an amenable number.

43131273512 is an abundant number, since it is smaller than the sum of its proper divisors (43446665128).

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

43131273512 is a wasteful number, since it uses less digits than its factorization.

43131273512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822 (or 3818 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

Adding to 43131273512 its reverse (21537213134), we get a palindrome (64668486646).

The spelling of 43131273512 in words is "forty-three billion, one hundred thirty-one million, two hundred seventy-three thousand, five hundred twelve".