11271808831 has 4 divisors (see below), whose sum is σ = 11318580064. Its totient is φ = 11225037600.

The previous prime is 11271808829. The next prime is 11271808859. The reversal of 11271808831 is 13880817211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13880817211 = 359 ⋅38665229.

It is a cyclic number.

It is not a de Polignac number, because 11271808831 - 2¹ = 11271808829 is a prime.

It is a super-2 number, since 2×11271808831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11271808861) 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, 23385255 + ... + 23385736.

It is an arithmetic number, because the mean of its divisors is an integer number (2829645016).

Almost surely, 2^11271808831 is an apocalyptic number.

11271808831 is a deficient number, since it is larger than the sum of its proper divisors (46771233).

11271808831 is an equidigital number, since it uses as much as digits as its factorization.

11271808831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46771232.

The product of its (nonzero) digits is 21504, while the sum is 40.

The spelling of 11271808831 in words is "eleven billion, two hundred seventy-one million, eight hundred eight thousand, eight hundred thirty-one".