43665620131 has 8 divisors (see below), whose sum is σ = 51624378720. Its totient is φ = 36137064768.

The previous prime is 43665620107. The next prime is 43665620161. The reversal of 43665620131 is 13102656634.

43665620131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43665620131 - 2¹¹ = 43665618083 is a prime.

It is a super-2 number, since 2×43665620131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43665620161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107550586 + ... + 107550991.

It is an arithmetic number, because the mean of its divisors is an integer number (6453047340).

Almost surely, 2^43665620131 is an apocalyptic number.

43665620131 is a deficient number, since it is larger than the sum of its proper divisors (7958758589).

43665620131 is a wasteful number, since it uses less digits than its factorization.

43665620131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215101613.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 43665620131 in words is "forty-three billion, six hundred sixty-five million, six hundred twenty thousand, one hundred thirty-one".