11255878131 has 4 divisors (see below), whose sum is σ = 15007837512. Its totient is φ = 7503918752.

The previous prime is 11255878129. The next prime is 11255878147. The reversal of 11255878131 is 13187855211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13187855211 = 3 ⋅4395951737.

It is a cyclic number.

It is not a de Polignac number, because 11255878131 - 2¹ = 11255878129 is a prime.

It is a super-2 number, since 2×11255878131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11255878631) 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, 1875979686 + ... + 1875979691.

It is an arithmetic number, because the mean of its divisors is an integer number (3751959378).

Almost surely, 2^11255878131 is an apocalyptic number.

11255878131 is a deficient number, since it is larger than the sum of its proper divisors (3751959381).

11255878131 is an equidigital number, since it uses as much as digits as its factorization.

11255878131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751959380.

The product of its digits is 67200, while the sum is 42.

The spelling of 11255878131 in words is "eleven billion, two hundred fifty-five million, eight hundred seventy-eight thousand, one hundred thirty-one".