1232311143 has 12 divisors (see below), whose sum is σ = 1911339960. Its totient is φ = 704177712.

The previous prime is 1232311117. The next prime is 1232311153. The reversal of 1232311143 is 3411132321.

It is not a de Polignac number, because 1232311143 - 2¹² = 1232307047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232311153) 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, 4191388 + ... + 4191681.

It is an arithmetic number, because the mean of its divisors is an integer number (159278330).

Almost surely, 2^1232311143 is an apocalyptic number.

1232311143 is a deficient number, since it is larger than the sum of its proper divisors (679028817).

1232311143 is an equidigital number, since it uses as much as digits as its factorization.

1232311143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8383086 (or 8383079 counting only the distinct ones).

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

The square root of 1232311143 is about 35104.2895242163. The cubic root of 1232311143 is about 1072.1119213615. Note that the first 3 decimals are identical.

Adding to 1232311143 its reverse (3411132321), we get a palindrome (4643443464).

The spelling of 1232311143 in words is "one billion, two hundred thirty-two million, three hundred eleven thousand, one hundred forty-three".