11431230331 has 4 divisors (see below), whose sum is σ = 11478663064. Its totient is φ = 11383797600.

The previous prime is 11431230329. The next prime is 11431230341. The reversal of 11431230331 is 13303213411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13303213411 = 491 ⋅27094121.

It is a cyclic number.

It is not a de Polignac number, because 11431230331 - 2¹ = 11431230329 is a prime.

It is a super-2 number, since 2×11431230331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11431230341) 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, 23716005 + ... + 23716486.

It is an arithmetic number, because the mean of its divisors is an integer number (2869665766).

Almost surely, 2^11431230331 is an apocalyptic number.

11431230331 is a deficient number, since it is larger than the sum of its proper divisors (47432733).

11431230331 is an equidigital number, since it uses as much as digits as its factorization.

11431230331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47432732.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 11431230331 its reverse (13303213411), we get a palindrome (24734443742).

The spelling of 11431230331 in words is "eleven billion, four hundred thirty-one million, two hundred thirty thousand, three hundred thirty-one".