1135543131 has 24 divisors (see below), whose sum is σ = 1709116864. Its totient is φ = 753406920.

The previous prime is 1135543127. The next prime is 1135543159. The reversal of 1135543131 is 1313455311.

It is a happy number.

1135543131 is a `hidden beast` number, since 113 + 5 + 543 + 1 + 3 + 1 = 666.

It is not a de Polignac number, because 1135543131 - 2² = 1135543127 is a prime.

It is a super-2 number, since 2×1135543131² = 2578916404722566322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1135543095 and 1135543104.

It is not an unprimeable number, because it can be changed into a prime (1135543231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40200 + ... + 62346.

Almost surely, 2^1135543131 is an apocalyptic number.

1135543131 is a deficient number, since it is larger than the sum of its proper divisors (573573733).

1135543131 is an equidigital number, since it uses as much as digits as its factorization.

1135543131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22373 (or 22361 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 1135543131 is about 33697.8208642636. The cubic root of 1135543131 is about 1043.2807918117.

Adding to 1135543131 its reverse (1313455311), we get a palindrome (2448998442).

The spelling of 1135543131 in words is "one billion, one hundred thirty-five million, five hundred forty-three thousand, one hundred thirty-one".