1123203231 has 12 divisors (see below), whose sum is σ = 1622695152. Its totient is φ = 748668096.

The previous prime is 1123203223. The next prime is 1123203233. The reversal of 1123203231 is 1323023211.

1123203231 is a `hidden beast` number, since 112 + 320 + 3 + 231 = 666.

It is not a de Polignac number, because 1123203231 - 2³ = 1123203223 is a prime.

It is a super-2 number, since 2×1123203231² = 2523170996257678722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123203233) 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 11 ways as a sum of consecutive naturals, for example, 93870 + ... + 105156.

It is an arithmetic number, because the mean of its divisors is an integer number (135224596).

Almost surely, 2^1123203231 is an apocalyptic number.

1123203231 is a deficient number, since it is larger than the sum of its proper divisors (499491921).

1123203231 is a wasteful number, since it uses less digits than its factorization.

1123203231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22350 (or 22347 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1123203231 is about 33514.2243084933. The cubic root of 1123203231 is about 1039.4879231384.

Adding to 1123203231 its reverse (1323023211), we get a palindrome (2446226442).

The spelling of 1123203231 in words is "one billion, one hundred twenty-three million, two hundred three thousand, two hundred thirty-one".