111145819 has 4 divisors (see below), whose sum is σ = 114731200. Its totient is φ = 107560440.

The previous prime is 111145807. The next prime is 111145829. The reversal of 111145819 is 918541111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111145819 - 2⁷ = 111145691 is a prime.

It is a super-2 number, since 2×111145819² = 24706786162361522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 3585349 = 111145819 / (1 + 1 + 1 + 1 + 4 + 5 + 8 + 1 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111145829) 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 in 3 ways as a sum of consecutive naturals, for example, 1792644 + ... + 1792705.

It is an arithmetic number, because the mean of its divisors is an integer number (28682800).

Almost surely, 2^111145819 is an apocalyptic number.

111145819 is a deficient number, since it is larger than the sum of its proper divisors (3585381).

111145819 is an equidigital number, since it uses as much as digits as its factorization.

111145819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585380.

The product of its digits is 1440, while the sum is 31.

The square root of 111145819 is about 10542.5717450725. The cubic root of 111145819 is about 480.7999089957.

The spelling of 111145819 in words is "one hundred eleven million, one hundred forty-five thousand, eight hundred nineteen".