16231138243 has 2 divisors, whose sum is σ = 16231138244. Its totient is φ = 16231138242.

The previous prime is 16231138241. The next prime is 16231138277. The reversal of 16231138243 is 34283113261.

It is an a-pointer prime, because the next prime (16231138277) can be obtained adding 16231138243 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16231138243 - 2¹ = 16231138241 is a prime.

Together with 16231138241, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 16231138199 and 16231138208.

It is not a weakly prime, because it can be changed into another prime (16231138241) 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 as a sum of consecutive naturals, namely, 8115569121 + 8115569122.

It is an arithmetic number, because the mean of its divisors is an integer number (8115569122).

Almost surely, 2^16231138243 is an apocalyptic number.

16231138243 is a deficient number, since it is larger than the sum of its proper divisors (1).

16231138243 is an equidigital number, since it uses as much as digits as its factorization.

16231138243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The spelling of 16231138243 in words is "sixteen billion, two hundred thirty-one million, one hundred thirty-eight thousand, two hundred forty-three".