1111551143 has 4 divisors (see below), whose sum is σ = 1111667880. Its totient is φ = 1111434408.

The previous prime is 1111551131. The next prime is 1111551163. The reversal of 1111551143 is 3411551111.

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 1111551143 - 2⁸ = 1111550887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111551163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42680 + ... + 63597.

It is an arithmetic number, because the mean of its divisors is an integer number (277916970).

Almost surely, 2^1111551143 is an apocalyptic number.

1111551143 is a deficient number, since it is larger than the sum of its proper divisors (116737).

1111551143 is a wasteful number, since it uses less digits than its factorization.

1111551143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116736.

The product of its digits is 300, while the sum is 23.

The square root of 1111551143 is about 33339.9331583013. The cubic root of 1111551143 is about 1035.8808787447.

The spelling of 1111551143 in words is "one billion, one hundred eleven million, five hundred fifty-one thousand, one hundred forty-three".