1133240231 has 4 divisors (see below), whose sum is σ = 1133438112. Its totient is φ = 1133042352.

The previous prime is 1133240219. The next prime is 1133240243. The reversal of 1133240231 is 1320423311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1320423311 = 47 ⋅28094113.

It is an interprime number because it is at equal distance from previous prime (1133240219) and next prime (1133240243).

It is a cyclic number.

It is not a de Polignac number, because 1133240231 - 2⁶ = 1133240167 is a prime.

It is a super-2 number, since 2×1133240231² = 2568466842313866722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133240201) 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, 90086 + ... + 101891.

It is an arithmetic number, because the mean of its divisors is an integer number (283359528).

Almost surely, 2^1133240231 is an apocalyptic number.

1133240231 is a deficient number, since it is larger than the sum of its proper divisors (197881).

1133240231 is an equidigital number, since it uses as much as digits as its factorization.

1133240231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197880.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1133240231 is about 33663.6336571084. The cubic root of 1133240231 is about 1042.5750510217.

Adding to 1133240231 its reverse (1320423311), we get a palindrome (2453663542).

The spelling of 1133240231 in words is "one billion, one hundred thirty-three million, two hundred forty thousand, two hundred thirty-one".