111155543 has 2 divisors, whose sum is σ = 111155544. Its totient is φ = 111155542.

The previous prime is 111155519. The next prime is 111155549. The reversal of 111155543 is 345551111.

It is a strong prime.

It is an emirp because it is prime and its reverse (345551111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111155543 - 2⁸ = 111155287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111155549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55577771 + 55577772.

It is an arithmetic number, because the mean of its divisors is an integer number (55577772).

Almost surely, 2^111155543 is an apocalyptic number.

111155543 is a deficient number, since it is larger than the sum of its proper divisors (1).

111155543 is an equidigital number, since it uses as much as digits as its factorization.

111155543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1500, while the sum is 26.

The square root of 111155543 is about 10543.0329127818. The cubic root of 111155543 is about 480.8139301019.

The spelling of 111155543 in words is "one hundred eleven million, one hundred fifty-five thousand, five hundred forty-three".