1143111523 has 4 divisors (see below), whose sum is σ = 1192812048. Its totient is φ = 1093411000.

The previous prime is 1143111517. The next prime is 1143111533. The reversal of 1143111523 is 3251113411.

It is a happy number.

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 1143111523 - 2²⁹ = 606240611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143111494 and 1143111503.

It is not an unprimeable number, because it can be changed into a prime (1143111533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24850228 + ... + 24850273.

It is an arithmetic number, because the mean of its divisors is an integer number (298203012).

Almost surely, 2^1143111523 is an apocalyptic number.

1143111523 is a deficient number, since it is larger than the sum of its proper divisors (49700525).

1143111523 is an equidigital number, since it uses as much as digits as its factorization.

1143111523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49700524.

The product of its digits is 360, while the sum is 22.

The square root of 1143111523 is about 33809.9323128574. The cubic root of 1143111523 is about 1045.5934826206.

Adding to 1143111523 its reverse (3251113411), we get a palindrome (4394224934).

The spelling of 1143111523 in words is "one billion, one hundred forty-three million, one hundred eleven thousand, five hundred twenty-three".