1131231233 has 4 divisors (see below), whose sum is σ = 1234070448. Its totient is φ = 1028392020.

The previous prime is 1131231197. The next prime is 1131231239. The reversal of 1131231233 is 3321321311.

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 1131231233 - 2⁸ = 1131230977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1131231239) 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, 51419591 + ... + 51419612.

It is an arithmetic number, because the mean of its divisors is an integer number (308517612).

Almost surely, 2^1131231233 is an apocalyptic number.

It is an amenable number.

1131231233 is a deficient number, since it is larger than the sum of its proper divisors (102839215).

1131231233 is a wasteful number, since it uses less digits than its factorization.

1131231233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102839214.

The product of its digits is 324, while the sum is 20.

The square root of 1131231233 is about 33633.7811285023. The cubic root of 1131231233 is about 1041.9585973998.

Adding to 1131231233 its reverse (3321321311), we get a palindrome (4452552544).

The spelling of 1131231233 in words is "one billion, one hundred thirty-one million, two hundred thirty-one thousand, two hundred thirty-three".