1232431531 has 4 divisors (see below), whose sum is σ = 1274929200. Its totient is φ = 1189933864.

The previous prime is 1232431489. The next prime is 1232431537. The reversal of 1232431531 is 1351342321.

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 1232431531 - 2⁹ = 1232431019 is a prime.

It is a super-2 number, since 2×1232431531² = 3037774957206007922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1232431496 and 1232431505.

It is not an unprimeable number, because it can be changed into a prime (1232431537) 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, 21248791 + ... + 21248848.

It is an arithmetic number, because the mean of its divisors is an integer number (318732300).

Almost surely, 2^1232431531 is an apocalyptic number.

1232431531 is a deficient number, since it is larger than the sum of its proper divisors (42497669).

1232431531 is an equidigital number, since it uses as much as digits as its factorization.

1232431531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42497668.

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

The square root of 1232431531 is about 35106.0042015607. The cubic root of 1232431531 is about 1072.1468327846.

Adding to 1232431531 its reverse (1351342321), we get a palindrome (2583773852).

The spelling of 1232431531 in words is "one billion, two hundred thirty-two million, four hundred thirty-one thousand, five hundred thirty-one".