11575843131 has 4 divisors (see below), whose sum is σ = 15434457512. Its totient is φ = 7717228752.

The previous prime is 11575843109. The next prime is 11575843151. The reversal of 11575843131 is 13134857511.

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

It is not a de Polignac number, because 11575843131 - 2⁶ = 11575843067 is a prime.

It is a super-2 number, since 2×11575843131² (a number of 21 digits) 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 11575843131.

It is not an unprimeable number, because it can be changed into a prime (11575843151) 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, 1929307186 + ... + 1929307191.

It is an arithmetic number, because the mean of its divisors is an integer number (3858614378).

Almost surely, 2^11575843131 is an apocalyptic number.

11575843131 is a deficient number, since it is larger than the sum of its proper divisors (3858614381).

11575843131 is an equidigital number, since it uses as much as digits as its factorization.

11575843131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858614380.

The product of its digits is 50400, while the sum is 39.

The spelling of 11575843131 in words is "eleven billion, five hundred seventy-five million, eight hundred forty-three thousand, one hundred thirty-one".