43215716491 has 8 divisors (see below), whose sum is σ = 43295911344. Its totient is φ = 43135572480.

The previous prime is 43215716477. The next prime is 43215716503. The reversal of 43215716491 is 19461751234.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 43215716491 - 2¹⁵ = 43215683723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43215716441) 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 7 ways as a sum of consecutive naturals, for example, 1967731 + ... + 1989571.

It is an arithmetic number, because the mean of its divisors is an integer number (5411988918).

Almost surely, 2^43215716491 is an apocalyptic number.

43215716491 is a deficient number, since it is larger than the sum of its proper divisors (80194853).

43215716491 is a wasteful number, since it uses less digits than its factorization.

43215716491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25421.

The product of its digits is 181440, while the sum is 43.

The spelling of 43215716491 in words is "forty-three billion, two hundred fifteen million, seven hundred sixteen thousand, four hundred ninety-one".