1231323233 has 4 divisors (see below), whose sum is σ = 1407226560. Its totient is φ = 1055419908.

The previous prime is 1231323229. The next prime is 1231323263. The reversal of 1231323233 is 3323231321.

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.

It is a cyclic number.

It is not a de Polignac number, because 1231323233 - 2² = 1231323229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231323199 and 1231323208.

It is not an unprimeable number, because it can be changed into a prime (1231323263) 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, 87951653 + ... + 87951666.

It is an arithmetic number, because the mean of its divisors is an integer number (351806640).

Almost surely, 2^1231323233 is an apocalyptic number.

It is an amenable number.

1231323233 is a deficient number, since it is larger than the sum of its proper divisors (175903327).

1231323233 is an equidigital number, since it uses as much as digits as its factorization.

1231323233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175903326.

The product of its digits is 1944, while the sum is 23.

The square root of 1231323233 is about 35090.2156305714. The cubic root of 1231323233 is about 1071.8253505413.

Adding to 1231323233 its reverse (3323231321), we get a palindrome (4554554554).

The spelling of 1231323233 in words is "one billion, two hundred thirty-one million, three hundred twenty-three thousand, two hundred thirty-three".