1231333133 has 8 divisors (see below), whose sum is σ = 1304095200. Its totient is φ = 1159366608.

The previous prime is 1231333111. The next prime is 1231333139. The reversal of 1231333133 is 3313331321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231333133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1231333099 and 1231333108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231333139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195698 + ... + 201891.

It is an arithmetic number, because the mean of its divisors is an integer number (163011900).

Almost surely, 2^1231333133 is an apocalyptic number.

It is an amenable number.

1231333133 is a deficient number, since it is larger than the sum of its proper divisors (72762067).

1231333133 is a wasteful number, since it uses less digits than its factorization.

1231333133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397771.

The product of its digits is 1458, while the sum is 23.

The square root of 1231333133 is about 35090.3566952518. The cubic root of 1231333133 is about 1071.8282230724.

Adding to 1231333133 its reverse (3313331321), we get a palindrome (4544664454).

The spelling of 1231333133 in words is "one billion, two hundred thirty-one million, three hundred thirty-three thousand, one hundred thirty-three".