1123231143 has 4 divisors (see below), whose sum is σ = 1497641528. Its totient is φ = 748820760.

The previous prime is 1123231141. The next prime is 1123231159. The reversal of 1123231143 is 3411323211.

1123231143 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1123231143 - 2¹ = 1123231141 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 (1123231141) 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, 187205188 + ... + 187205193.

It is an arithmetic number, because the mean of its divisors is an integer number (374410382).

Almost surely, 2^1123231143 is an apocalyptic number.

1123231143 is a deficient number, since it is larger than the sum of its proper divisors (374410385).

1123231143 is an equidigital number, since it uses as much as digits as its factorization.

1123231143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374410384.

The product of its digits is 432, while the sum is 21.

The square root of 1123231143 is about 33514.6407261066. The cubic root of 1123231143 is about 1039.4965336153.

Adding to 1123231143 its reverse (3411323211), we get a palindrome (4534554354).

The spelling of 1123231143 in words is "one billion, one hundred twenty-three million, two hundred thirty-one thousand, one hundred forty-three".