1100243143 has 2 divisors, whose sum is σ = 1100243144. Its totient is φ = 1100243142.

The previous prime is 1100243141. The next prime is 1100243149. The reversal of 1100243143 is 3413420011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1100243143 - 2¹ = 1100243141 is a prime.

Together with 1100243141, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1100243143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100243141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550121571 + 550121572.

It is an arithmetic number, because the mean of its divisors is an integer number (550121572).

Almost surely, 2^1100243143 is an apocalyptic number.

1100243143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100243143 is an equidigital number, since it uses as much as digits as its factorization.

1100243143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1100243143 is about 33169.9132196634. The cubic root of 1100243143 is about 1032.3561679392.

Adding to 1100243143 its reverse (3413420011), we get a palindrome (4513663154).

It can be divided in two parts, 1100243 and 143, that added together give a triangular number (1100386 = T₁₄₈₃).

The spelling of 1100243143 in words is "one billion, one hundred million, two hundred forty-three thousand, one hundred forty-three".