11113240431 has 4 divisors (see below), whose sum is σ = 14817653912. Its totient is φ = 7408826952.

The previous prime is 11113240427. The next prime is 11113240451. The reversal of 11113240431 is 13404231111.

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

It is not a de Polignac number, because 11113240431 - 2² = 11113240427 is a prime.

It is a super-2 number, since 2×11113240431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11113240398 and 11113240407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11113240451) 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, 1852206736 + ... + 1852206741.

It is an arithmetic number, because the mean of its divisors is an integer number (3704413478).

Almost surely, 2^11113240431 is an apocalyptic number.

11113240431 is a deficient number, since it is larger than the sum of its proper divisors (3704413481).

11113240431 is an equidigital number, since it uses as much as digits as its factorization.

11113240431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3704413480.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 11113240431 its reverse (13404231111), we get a palindrome (24517471542).

The spelling of 11113240431 in words is "eleven billion, one hundred thirteen million, two hundred forty thousand, four hundred thirty-one".