11441231531 has 4 divisors (see below), whose sum is σ = 11470051152. Its totient is φ = 11412411912.

The previous prime is 11441231513. The next prime is 11441231537. The reversal of 11441231531 is 13513214411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13513214411 = 281 ⋅48089731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11441231531 is a prime.

It is a super-2 number, since 2×11441231531² (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 11441231531.

It is not an unprimeable number, because it can be changed into a prime (11441231537) 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, 14409215 + ... + 14410008.

It is an arithmetic number, because the mean of its divisors is an integer number (2867512788).

Almost surely, 2^11441231531 is an apocalyptic number.

11441231531 is a deficient number, since it is larger than the sum of its proper divisors (28819621).

11441231531 is an equidigital number, since it uses as much as digits as its factorization.

11441231531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28819620.

The product of its digits is 1440, while the sum is 26.

Adding to 11441231531 its reverse (13513214411), we get a palindrome (24954445942).

The spelling of 11441231531 in words is "eleven billion, four hundred forty-one million, two hundred thirty-one thousand, five hundred thirty-one".