1231434233 has 4 divisors (see below), whose sum is σ = 1232011008. Its totient is φ = 1230857460.

The previous prime is 1231434187. The next prime is 1231434257. The reversal of 1231434233 is 3324341321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3324341321 = 7 ⋅474905903.

It is a cyclic number.

It is not a de Polignac number, because 1231434233 - 2¹⁰ = 1231433209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231434133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285173 + ... + 289458.

It is an arithmetic number, because the mean of its divisors is an integer number (308002752).

Almost surely, 2^1231434233 is an apocalyptic number.

It is an amenable number.

1231434233 is a deficient number, since it is larger than the sum of its proper divisors (576775).

1231434233 is an equidigital number, since it uses as much as digits as its factorization.

1231434233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576774.

The product of its digits is 5184, while the sum is 26.

The square root of 1231434233 is about 35091.7972324018. The cubic root of 1231434233 is about 1071.8575568258.

Adding to 1231434233 its reverse (3324341321), we get a palindrome (4555775554).

The spelling of 1231434233 in words is "one billion, two hundred thirty-one million, four hundred thirty-four thousand, two hundred thirty-three".