243916916831 has 4 divisors (see below), whose sum is σ = 278762190672. Its totient is φ = 209071642992.

The previous prime is 243916916783. The next prime is 243916916839. The reversal of 243916916831 is 138619619342.

243916916831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243916916831 is a prime.

It is a super-2 number, since 2×243916916831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243916916839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17422636910 + ... + 17422636923.

It is an arithmetic number, because the mean of its divisors is an integer number (69690547668).

Almost surely, 2^243916916831 is an apocalyptic number.

243916916831 is a deficient number, since it is larger than the sum of its proper divisors (34845273841).

243916916831 is an equidigital number, since it uses as much as digits as its factorization.

243916916831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34845273840.

The product of its digits is 1679616, while the sum is 53.

The spelling of 243916916831 in words is "two hundred forty-three billion, nine hundred sixteen million, nine hundred sixteen thousand, eight hundred thirty-one".