1232331231 has 4 divisors (see below), whose sum is σ = 1643108312. Its totient is φ = 821554152.

The previous prime is 1232331229. The next prime is 1232331257. The reversal of 1232331231 is 1321332321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1232331231 - 2¹ = 1232331229 is a prime.

It is a super-2 number, since 2×1232331231² = 3037280525795950722, 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 = 1232331198 and 1232331207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232338231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205388536 + ... + 205388541.

It is an arithmetic number, because the mean of its divisors is an integer number (410777078).

Almost surely, 2^1232331231 is an apocalyptic number.

1232331231 is a deficient number, since it is larger than the sum of its proper divisors (410777081).

1232331231 is an equidigital number, since it uses as much as digits as its factorization.

1232331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410777080.

The product of its digits is 648, while the sum is 21.

The square root of 1232331231 is about 35104.5756419302. The cubic root of 1232331231 is about 1072.1177468565.

Adding to 1232331231 its reverse (1321332321), we get a palindrome (2553663552).

The spelling of 1232331231 in words is "one billion, two hundred thirty-two million, three hundred thirty-one thousand, two hundred thirty-one".