1123232231 has 8 divisors (see below), whose sum is σ = 1235472528. Its totient is φ = 1021119000.

The previous prime is 1123232219. The next prime is 1123232237. The reversal of 1123232231 is 1322323211.

It is not a de Polignac number, because 1123232231 - 2¹⁸ = 1122970087 is a prime.

It is a super-2 number, since 2×1123232231² = 2523301289514474722, 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 (1123232237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420620 + ... + 423281.

It is an arithmetic number, because the mean of its divisors is an integer number (154434066).

Almost surely, 2^1123232231 is an apocalyptic number.

1123232231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123232231 is a deficient number, since it is larger than the sum of its proper divisors (112240297).

1123232231 is an frugal number, since it uses more digits than its factorization.

1123232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843934 (or 843912 counting only the distinct ones).

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

The square root of 1123232231 is about 33514.6569578147. The cubic root of 1123232231 is about 1039.4968692458.

Adding to 1123232231 its reverse (1322323211), we get a palindrome (2445555442).

The spelling of 1123232231 in words is "one billion, one hundred twenty-three million, two hundred thirty-two thousand, two hundred thirty-one".