16115543 has 2 divisors, whose sum is σ = 16115544. Its totient is φ = 16115542.

The previous prime is 16115537. The next prime is 16115569. The reversal of 16115543 is 34551161.

It is an a-pointer prime, because the next prime (16115569) can be obtained adding 16115543 to its sum of digits (26).

It is a weak prime.

It is an emirp because it is prime and its reverse (34551161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16115543 - 2⁴ = 16115527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16115573) 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 as a sum of consecutive naturals, namely, 8057771 + 8057772.

It is an arithmetic number, because the mean of its divisors is an integer number (8057772).

Almost surely, 2^16115543 is an apocalyptic number.

16115543 is a deficient number, since it is larger than the sum of its proper divisors (1).

16115543 is an equidigital number, since it uses as much as digits as its factorization.

16115543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 16115543 is about 4014.4168941454. The cubic root of 16115543 is about 252.5893184648.

The spelling of 16115543 in words is "sixteen million, one hundred fifteen thousand, five hundred forty-three".