43122431987 has 4 divisors (see below), whose sum is σ = 43729790256. Its totient is φ = 42515073720.

The previous prime is 43122431969. The next prime is 43122432071. The reversal of 43122431987 is 78913422134.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43122431987 - 2⁸ = 43122431731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43122431917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303679028 + ... + 303679169.

It is an arithmetic number, because the mean of its divisors is an integer number (10932447564).

Almost surely, 2^43122431987 is an apocalyptic number.

43122431987 is a deficient number, since it is larger than the sum of its proper divisors (607358269).

43122431987 is an equidigital number, since it uses as much as digits as its factorization.

43122431987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607358268.

The product of its digits is 290304, while the sum is 44.

The spelling of 43122431987 in words is "forty-three billion, one hundred twenty-two million, four hundred thirty-one thousand, nine hundred eighty-seven".