111143243 has 2 divisors, whose sum is σ = 111143244. Its totient is φ = 111143242.

The previous prime is 111143239. The next prime is 111143257. The reversal of 111143243 is 342341111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111143243 - 2² = 111143239 is a prime.

It is not a weakly prime, because it can be changed into another prime (111143273) 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, 55571621 + 55571622.

It is an arithmetic number, because the mean of its divisors is an integer number (55571622).

Almost surely, 2^111143243 is an apocalyptic number.

111143243 is a deficient number, since it is larger than the sum of its proper divisors (1).

111143243 is an equidigital number, since it uses as much as digits as its factorization.

111143243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 111143243 is about 10542.4495730357. The cubic root of 111143243 is about 480.7961945056.

Adding to 111143243 its reverse (342341111), we get a palindrome (453484354).

The spelling of 111143243 in words is "one hundred eleven million, one hundred forty-three thousand, two hundred forty-three".