43071631137 has 12 divisors (see below), whose sum is σ = 65874259620. Its totient is φ = 27025337088.

The previous prime is 43071631129. The next prime is 43071631151. The reversal of 43071631137 is 73113617034.

43071631137 is a `hidden beast` number, since 4 + 3 + 0 + 7 + 1 + 631 + 13 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13042553616 + 30029077521 = 114204^2 + 173289^2 .

It is not a de Polignac number, because 43071631137 - 2³ = 43071631129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43071639137) 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, 140756812 + ... + 140757117.

It is an arithmetic number, because the mean of its divisors is an integer number (5489521635).

Almost surely, 2^43071631137 is an apocalyptic number.

It is an amenable number.

43071631137 is a deficient number, since it is larger than the sum of its proper divisors (22802628483).

43071631137 is a wasteful number, since it uses less digits than its factorization.

43071631137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281513952 (or 281513949 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The spelling of 43071631137 in words is "forty-three billion, seventy-one million, six hundred thirty-one thousand, one hundred thirty-seven".