111541663 has 2 divisors, whose sum is σ = 111541664. Its totient is φ = 111541662.

The previous prime is 111541649. The next prime is 111541693. The reversal of 111541663 is 366145111.

It is a weak prime.

It is an emirp because it is prime and its reverse (366145111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111541663 - 2⁹ = 111541151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111541693) 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, 55770831 + 55770832.

It is an arithmetic number, because the mean of its divisors is an integer number (55770832).

Almost surely, 2^111541663 is an apocalyptic number.

111541663 is a deficient number, since it is larger than the sum of its proper divisors (1).

111541663 is an equidigital number, since it uses as much as digits as its factorization.

111541663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 111541663 is about 10561.3286569446. The cubic root of 111541663 is about 481.3700196974.

Adding to 111541663 its reverse (366145111), we get a palindrome (477686774).

It can be divided in two parts, 1115 and 41663, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 111541663 in words is "one hundred eleven million, five hundred forty-one thousand, six hundred sixty-three".