1135191131 has 4 divisors (see below), whose sum is σ = 1135375200. Its totient is φ = 1135007064.

The previous prime is 1135191103. The next prime is 1135191143. The reversal of 1135191131 is 1311915311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1135191131 - 2¹⁸ = 1134928987 is a prime.

It is a super-2 number, since 2×1135191131² = 2577317807802118322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1135191131.

It is not an unprimeable number, because it can be changed into a prime (1135191181) 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, 82451 + ... + 95228.

It is an arithmetic number, because the mean of its divisors is an integer number (283843800).

Almost surely, 2^1135191131 is an apocalyptic number.

1135191131 is a deficient number, since it is larger than the sum of its proper divisors (184069).

1135191131 is an equidigital number, since it uses as much as digits as its factorization.

1135191131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184068.

The product of its digits is 405, while the sum is 26.

The square root of 1135191131 is about 33692.5975697927. The cubic root of 1135191131 is about 1043.1729806153.

The spelling of 1135191131 in words is "one billion, one hundred thirty-five million, one hundred ninety-one thousand, one hundred thirty-one".