111540143206 has 4 divisors (see below), whose sum is σ = 167310214812. Its totient is φ = 55770071602.

The previous prime is 111540143203. The next prime is 111540143227. The reversal of 111540143206 is 602341045111.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111540143203) 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, 27885035800 + ... + 27885035803.

It is an arithmetic number, because the mean of its divisors is an integer number (41827553703).

Almost surely, 2^111540143206 is an apocalyptic number.

111540143206 is a deficient number, since it is larger than the sum of its proper divisors (55770071606).

111540143206 is an equidigital number, since it uses as much as digits as its factorization.

111540143206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55770071605.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 111540143206 its reverse (602341045111), we get a palindrome (713881188317).

The spelling of 111540143206 in words is "one hundred eleven billion, five hundred forty million, one hundred forty-three thousand, two hundred six".