111540019 has 2 divisors, whose sum is σ = 111540020. Its totient is φ = 111540018.

The previous prime is 111540017. The next prime is 111540053. The reversal of 111540019 is 910045111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111540019 - 2¹ = 111540017 is a prime.

It is a super-2 number, since 2×111540019² = 24882351677040722, which contains 22 as substring.

Together with 111540017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111540017) 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, 55770009 + 55770010.

It is an arithmetic number, because the mean of its divisors is an integer number (55770010).

Almost surely, 2^111540019 is an apocalyptic number.

111540019 is a deficient number, since it is larger than the sum of its proper divisors (1).

111540019 is an equidigital number, since it uses as much as digits as its factorization.

111540019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 111540019 is about 10561.2508255415. The cubic root of 111540019 is about 481.3676547329.

The spelling of 111540019 in words is "one hundred eleven million, five hundred forty thousand, nineteen".