1123403231 has 16 divisors (see below), whose sum is σ = 1201068000. Its totient is φ = 1047072768.

The previous prime is 1123403227. The next prime is 1123403243. The reversal of 1123403231 is 1323043211.

It is a cyclic number.

It is not a de Polignac number, because 1123403231 - 2² = 1123403227 is a prime.

It is a super-2 number, since 2×1123403231² = 2524069638842478722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123403201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1668911 + ... + 1669583.

It is an arithmetic number, because the mean of its divisors is an integer number (75066750).

Almost surely, 2^1123403231 is an apocalyptic number.

1123403231 is a deficient number, since it is larger than the sum of its proper divisors (77664769).

1123403231 is a wasteful number, since it uses less digits than its factorization.

1123403231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1123403231 is about 33517.2079833628. The cubic root of 1123403231 is about 1039.5496173004.

Adding to 1123403231 its reverse (1323043211), we get a palindrome (2446446442).

The spelling of 1123403231 in words is "one billion, one hundred twenty-three million, four hundred three thousand, two hundred thirty-one".