111518819 has 2 divisors, whose sum is σ = 111518820. Its totient is φ = 111518818.

The previous prime is 111518807. The next prime is 111518867. The reversal of 111518819 is 918815111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (918815111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111518819 is a prime.

It is a super-2 number, since 2×111518819² = 24872893982309522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111518899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55759409 + 55759410.

It is an arithmetic number, because the mean of its divisors is an integer number (55759410).

Almost surely, 2^111518819 is an apocalyptic number.

111518819 is a deficient number, since it is larger than the sum of its proper divisors (1).

111518819 is an equidigital number, since it uses as much as digits as its factorization.

111518819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 35.

The square root of 111518819 is about 10560.2471088512. The cubic root of 111518819 is about 481.3371555423.

The spelling of 111518819 in words is "one hundred eleven million, five hundred eighteen thousand, eight hundred nineteen".