11516543 has 2 divisors, whose sum is σ = 11516544. Its totient is φ = 11516542.

The previous prime is 11516539. The next prime is 11516569. The reversal of 11516543 is 34561511.

It is an a-pointer prime, because the next prime (11516569) can be obtained adding 11516543 to its sum of digits (26).

It is a weak prime.

It is an emirp because it is prime and its reverse (34561511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11516543 - 2² = 11516539 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 (11516513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5758271 + 5758272.

It is an arithmetic number, because the mean of its divisors is an integer number (5758272).

Almost surely, 2^11516543 is an apocalyptic number.

11516543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11516543 is an equidigital number, since it uses as much as digits as its factorization.

11516543 is an evil number, because the sum of its binary digits is even.

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

The square root of 11516543 is about 3393.6032472875. The cubic root of 11516543 is about 225.8260532716.

The spelling of 11516543 in words is "eleven million, five hundred sixteen thousand, five hundred forty-three".