1131334511 has 4 divisors (see below), whose sum is σ = 1180522992. Its totient is φ = 1082146032.

The previous prime is 1131334507. The next prime is 1131334579. The reversal of 1131334511 is 1154331311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1154331311 = 7 ⋅164904473.

It is a cyclic number.

It is not a de Polignac number, because 1131334511 - 2² = 1131334507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 49188457 = 1131334511 / (1 + 1 + 3 + 1 + 3 + 3 + 4 + 5 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131334111) 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, 24594206 + ... + 24594251.

It is an arithmetic number, because the mean of its divisors is an integer number (295130748).

Almost surely, 2^1131334511 is an apocalyptic number.

1131334511 is a deficient number, since it is larger than the sum of its proper divisors (49188481).

1131334511 is an equidigital number, since it uses as much as digits as its factorization.

1131334511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49188480.

The product of its digits is 540, while the sum is 23.

The square root of 1131334511 is about 33635.3164248532. The cubic root of 1131334511 is about 1041.9903056607.

Adding to 1131334511 its reverse (1154331311), we get a palindrome (2285665822).

The spelling of 1131334511 in words is "one billion, one hundred thirty-one million, three hundred thirty-four thousand, five hundred eleven".