1123345231 has 4 divisors (see below), whose sum is σ = 1172186352. Its totient is φ = 1074504112.

The previous prime is 1123345217. The next prime is 1123345241. The reversal of 1123345231 is 1325433211.

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 1123345231 - 2¹⁷ = 1123214159 is a prime.

It is a super-2 number, since 2×1123345231² = 2523809016020886722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123345196 and 1123345205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123345241) 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 3 ways as a sum of consecutive naturals, for example, 24420526 + ... + 24420571.

It is an arithmetic number, because the mean of its divisors is an integer number (293046588).

Almost surely, 2^1123345231 is an apocalyptic number.

1123345231 is a deficient number, since it is larger than the sum of its proper divisors (48841121).

1123345231 is an equidigital number, since it uses as much as digits as its factorization.

1123345231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48841120.

The product of its digits is 2160, while the sum is 25.

The square root of 1123345231 is about 33516.3427449953. The cubic root of 1123345231 is about 1039.5317267473.

Adding to 1123345231 its reverse (1325433211), we get a palindrome (2448778442).

The spelling of 1123345231 in words is "one billion, one hundred twenty-three million, three hundred forty-five thousand, two hundred thirty-one".