43123222139987 has 16 divisors (see below), whose sum is σ = 47073045487104. Its totient is φ = 39178323720000.

The previous prime is 43123222139927. The next prime is 43123222139993. The reversal of 43123222139987 is 78993122232134.

It is a cyclic number.

It is not a de Polignac number, because 43123222139987 - 2²⁸ = 43122953704531 is a prime.

It is a super-2 number, since 2×43123222139987² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43123222139927) 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, 302779562 + ... + 302921952.

It is an arithmetic number, because the mean of its divisors is an integer number (2942065342944).

Almost surely, 2^{43123222139987} is an apocalyptic number.

43123222139987 is a deficient number, since it is larger than the sum of its proper divisors (3949823347117).

43123222139987 is a wasteful number, since it uses less digits than its factorization.

43123222139987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159490.

The product of its digits is 7838208, while the sum is 56.

The spelling of 43123222139987 in words is "forty-three trillion, one hundred twenty-three billion, two hundred twenty-two million, one hundred thirty-nine thousand, nine hundred eighty-seven".